diff --git a/AUTHORS b/AUTHORS
index 4c8b49b8e7b96..eba1dc976d8fa 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -1418,6 +1418,7 @@ Tony Shen <legendmastertony@gmail.com>
 Torsten Kurbad <google@tk-webart.de>
 Toshihito Kikuchi <leamovret@gmail.com>
 Toshiaki Tanaka <zokutyou2@gmail.com>
+Travis Leithead <travis.leithead@gmail.com>
 Trent Willis <trentmwillis@gmail.com>
 Trevor Perrin <unsafe@trevp.net>
 Tripta Gupta <triptagupta19@gmail.com>
diff --git a/third_party/blink/renderer/core/dom/element_test.cc b/third_party/blink/renderer/core/dom/element_test.cc
index 0d06344eedb87..4c0c0e334e4d6 100644
--- a/third_party/blink/renderer/core/dom/element_test.cc
+++ b/third_party/blink/renderer/core/dom/element_test.cc
@@ -617,75 +617,75 @@ TEST_F(ElementTest, ParseFocusgroupAttrDefaultValuesWhenEmptyValue) {
   FocusgroupFlags fg_flags = fg->GetFocusgroupFlags();
   ASSERT_NE(fg_flags, FocusgroupFlags::kNone);
 
-  ASSERT_TRUE(fg_flags & FocusgroupFlags::kHorizontal);
-  ASSERT_TRUE(fg_flags & FocusgroupFlags::kVertical);
+  ASSERT_TRUE(fg_flags & FocusgroupFlags::kInline);
+  ASSERT_TRUE(fg_flags & FocusgroupFlags::kBlock);
   ASSERT_FALSE(fg_flags & FocusgroupFlags::kExtend);
-  ASSERT_FALSE(fg_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg_flags & FocusgroupFlags::kWrapBlock);
 }
 
 TEST_F(ElementTest, ParseFocusgroupAttrSupportedAxesAreValid) {
   Document& document = GetDocument();
   SetBodyContent(R"HTML(
-    <div id=fg1 focusgroup=horizontal></div>
-    <div id=fg2 focusgroup=vertical></div>
+    <div id=fg1 focusgroup=inline></div>
+    <div id=fg2 focusgroup=block></div>
     <div id=fg3 focusgroup>
-      <div id=fg3_a focusgroup="extend horizontal"></div>
-      <div id=fg3_b focusgroup="extend vertical">
+      <div id=fg3_a focusgroup="extend inline"></div>
+      <div id=fg3_b focusgroup="extend block">
         <div id=fg3_b_1 focusgroup=extend></div>
       </div>
     </div>
   )HTML");
 
-  // 1. Only horizontal should be supported.
+  // 1. Only inline should be supported.
   auto* fg1 = document.getElementById(AtomicString("fg1"));
   ASSERT_TRUE(fg1);
 
   FocusgroupFlags fg1_flags = fg1->GetFocusgroupFlags();
-  ASSERT_TRUE(fg1_flags & FocusgroupFlags::kHorizontal);
-  ASSERT_FALSE(fg1_flags & FocusgroupFlags::kVertical);
+  ASSERT_TRUE(fg1_flags & FocusgroupFlags::kInline);
+  ASSERT_FALSE(fg1_flags & FocusgroupFlags::kBlock);
 
-  // 2. Only vertical should be supported.
+  // 2. Only block should be supported.
   auto* fg2 = document.getElementById(AtomicString("fg2"));
   ASSERT_TRUE(fg2);
 
   FocusgroupFlags fg2_flags = fg2->GetFocusgroupFlags();
-  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kHorizontal);
-  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kVertical);
+  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kInline);
+  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kBlock);
 
   // 3. No axis specified so both should be supported
   auto* fg3 = document.getElementById(AtomicString("fg3"));
   ASSERT_TRUE(fg3);
 
   FocusgroupFlags fg3_flags = fg3->GetFocusgroupFlags();
-  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kHorizontal);
-  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kVertical);
+  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kInline);
+  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kBlock);
 
-  // 4. Only support horizontal because it's specified, regardless of the
+  // 4. Only support inline because it's specified, regardless of the
   // extend.
   auto* fg3_a = document.getElementById(AtomicString("fg3_a"));
   ASSERT_TRUE(fg3_a);
 
   FocusgroupFlags fg3_a_flags = fg3_a->GetFocusgroupFlags();
-  ASSERT_TRUE(fg3_a_flags & FocusgroupFlags::kHorizontal);
-  ASSERT_FALSE(fg3_a_flags & FocusgroupFlags::kVertical);
+  ASSERT_TRUE(fg3_a_flags & FocusgroupFlags::kInline);
+  ASSERT_FALSE(fg3_a_flags & FocusgroupFlags::kBlock);
 
-  // 5. Only support vertical because it's specified, regardless of the extend.
+  // 5. Only support block because it's specified, regardless of the extend.
   auto* fg3_b = document.getElementById(AtomicString("fg3_b"));
   ASSERT_TRUE(fg3_b);
 
   FocusgroupFlags fg3_b_flags = fg3_b->GetFocusgroupFlags();
-  ASSERT_FALSE(fg3_b_flags & FocusgroupFlags::kHorizontal);
-  ASSERT_TRUE(fg3_b_flags & FocusgroupFlags::kVertical);
+  ASSERT_FALSE(fg3_b_flags & FocusgroupFlags::kInline);
+  ASSERT_TRUE(fg3_b_flags & FocusgroupFlags::kBlock);
 
-  // 6. Extends a focusgroup that only supports vertical axis, but should
+  // 6. Extends a focusgroup that only supports block axis, but should
   // support both axes regardless.
   auto* fg3_b_1 = document.getElementById(AtomicString("fg3_b_1"));
   ASSERT_TRUE(fg3_b_1);
 
   FocusgroupFlags fg3_b_1_flags = fg3_b_1->GetFocusgroupFlags();
-  ASSERT_TRUE(fg3_b_1_flags & FocusgroupFlags::kHorizontal);
-  ASSERT_TRUE(fg3_b_1_flags & FocusgroupFlags::kVertical);
+  ASSERT_TRUE(fg3_b_1_flags & FocusgroupFlags::kInline);
+  ASSERT_TRUE(fg3_b_1_flags & FocusgroupFlags::kBlock);
 }
 
 TEST_F(ElementTest, ParseFocusgroupAttrExtendCorrectly) {
@@ -770,9 +770,9 @@ TEST_F(ElementTest, ParseFocusgroupAttrWrapCorrectly) {
   SetBodyContent(R"HTML(
     <div id=fg1 focusgroup=wrap>
       <div id=fg2 focusgroup=extend>
-        <div id=fg3 focusgroup="extend horizontal"></div>
-        <div id=fg4 focusgroup="extend vertical">
-          <div id=fg5 focusgroup="extend horizontal"></div>
+        <div id=fg3 focusgroup="extend inline"></div>
+        <div id=fg4 focusgroup="extend block">
+          <div id=fg5 focusgroup="extend inline"></div>
         </div>
       </div>
     </div>
@@ -785,8 +785,8 @@ TEST_F(ElementTest, ParseFocusgroupAttrWrapCorrectly) {
 
   FocusgroupFlags fg1_flags = fg1->GetFocusgroupFlags();
   ASSERT_NE(fg1_flags, FocusgroupFlags::kNone);
-  ASSERT_TRUE(fg1_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_TRUE(fg1_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_TRUE(fg1_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_TRUE(fg1_flags & FocusgroupFlags::kWrapBlock);
 
   // 2. When a focusgroup extends another one, it should inherit its wrap
   // properties in all supported axes.
@@ -795,28 +795,28 @@ TEST_F(ElementTest, ParseFocusgroupAttrWrapCorrectly) {
 
   FocusgroupFlags fg2_flags = fg2->GetFocusgroupFlags();
   ASSERT_NE(fg2_flags, FocusgroupFlags::kNone);
-  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kWrapBlock);
 
   // 3. The ancestor focusgroup's wrap properties should only be inherited in
-  // the horizontal axis.
+  // the inline axis.
   auto* fg3 = document.getElementById(AtomicString("fg3"));
   ASSERT_TRUE(fg3);
 
   FocusgroupFlags fg3_flags = fg3->GetFocusgroupFlags();
   ASSERT_NE(fg3_flags, FocusgroupFlags::kNone);
-  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapBlock);
 
   // 4. The ancestor focusgroup's wrap properties should only be inherited in
-  // the vertical axis.
+  // the block axis.
   auto* fg4 = document.getElementById(AtomicString("fg4"));
   ASSERT_TRUE(fg4);
 
   FocusgroupFlags fg4_flags = fg4->GetFocusgroupFlags();
   ASSERT_NE(fg4_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg4_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_TRUE(fg4_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg4_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_TRUE(fg4_flags & FocusgroupFlags::kWrapBlock);
 
   // 5. The ancestor focusgroup's wrap properties shouldn't be inherited since
   // the two focusgroups have no axis in common.
@@ -825,26 +825,26 @@ TEST_F(ElementTest, ParseFocusgroupAttrWrapCorrectly) {
 
   FocusgroupFlags fg5_flags = fg5->GetFocusgroupFlags();
   ASSERT_NE(fg5_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg5_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg5_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg5_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg5_flags & FocusgroupFlags::kWrapBlock);
 }
 
 TEST_F(ElementTest, ParseFocusgroupAttrDoesntWrapInExtendingFocusgroupOnly) {
   Document& document = GetDocument();
   SetBodyContent(R"HTML(
     <div id=fg1 focusgroup>
-      <div id=fg2 focusgroup="extend horizontal wrap"></div>
-      <div id=fg3 focusgroup="extend vertical wrap"></div>
+      <div id=fg2 focusgroup="extend inline wrap"></div>
+      <div id=fg3 focusgroup="extend block wrap"></div>
       <div id=fg4 focusgroup="extend wrap"></div>
     </div>
-    <div id=fg5 focusgroup=horizontal>
-      <div id=fg6 focusgroup="extend horizontal wrap"></div>
-      <div id=fg7 focusgroup="extend vertical wrap"></div>
+    <div id=fg5 focusgroup=inline>
+      <div id=fg6 focusgroup="extend inline wrap"></div>
+      <div id=fg7 focusgroup="extend block wrap"></div>
       <div id=fg8 focusgroup="extend wrap"></div>
     </div>
-    <div id=fg9 focusgroup=vertical>
-      <div id=fg10 focusgroup="extend horizontal wrap"></div>
-      <div id=fg11 focusgroup="extend vertical wrap"></div>
+    <div id=fg9 focusgroup=block>
+      <div id=fg10 focusgroup="extend inline wrap"></div>
+      <div id=fg11 focusgroup="extend block wrap"></div>
       <div id=fg12 focusgroup="extend wrap"></div>
     </div>
   )HTML");
@@ -876,63 +876,63 @@ TEST_F(ElementTest, ParseFocusgroupAttrDoesntWrapInExtendingFocusgroupOnly) {
 
   FocusgroupFlags fg1_flags = fg1->GetFocusgroupFlags();
   ASSERT_NE(fg1_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg1_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg1_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg1_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg1_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg2_flags = fg2->GetFocusgroupFlags();
   ASSERT_NE(fg2_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg3_flags = fg3->GetFocusgroupFlags();
   ASSERT_NE(fg3_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg4_flags = fg4->GetFocusgroupFlags();
   ASSERT_NE(fg4_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg4_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg4_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg4_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg4_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg5_flags = fg5->GetFocusgroupFlags();
   ASSERT_NE(fg5_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg5_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg5_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg5_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg5_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg6_flags = fg6->GetFocusgroupFlags();
   ASSERT_NE(fg6_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg6_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg6_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg6_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg6_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg7_flags = fg7->GetFocusgroupFlags();
   ASSERT_NE(fg7_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg7_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_TRUE(fg7_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg7_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_TRUE(fg7_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg8_flags = fg8->GetFocusgroupFlags();
   ASSERT_NE(fg8_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg8_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_TRUE(fg8_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg8_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_TRUE(fg8_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg9_flags = fg9->GetFocusgroupFlags();
   ASSERT_NE(fg9_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg9_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg9_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg9_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg9_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg10_flags = fg10->GetFocusgroupFlags();
   ASSERT_NE(fg10_flags, FocusgroupFlags::kNone);
-  ASSERT_TRUE(fg10_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg10_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_TRUE(fg10_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg10_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg11_flags = fg11->GetFocusgroupFlags();
   ASSERT_NE(fg11_flags, FocusgroupFlags::kNone);
-  ASSERT_FALSE(fg11_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg11_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg11_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg11_flags & FocusgroupFlags::kWrapBlock);
 
   FocusgroupFlags fg12_flags = fg12->GetFocusgroupFlags();
   ASSERT_NE(fg12_flags, FocusgroupFlags::kNone);
-  ASSERT_TRUE(fg12_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg12_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_TRUE(fg12_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg12_flags & FocusgroupFlags::kWrapBlock);
 }
 
 TEST_F(ElementTest, ParseFocusgroupAttrGrid) {
@@ -1011,35 +1011,26 @@ TEST_F(ElementTest, ParseFocusgroupAttrGrid) {
 
   ASSERT_EQ(e1_flags, FocusgroupFlags::kGrid);
   ASSERT_EQ(e2_flags, FocusgroupFlags::kGrid);
-  ASSERT_EQ(e3_flags,
-            (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapHorizontally |
-             FocusgroupFlags::kWrapVertically));
-  ASSERT_EQ(e4_flags,
-            (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapHorizontally));
-  ASSERT_EQ(e5_flags,
-            (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapVertically));
-  ASSERT_EQ(e6_flags,
-            (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapHorizontally |
-             FocusgroupFlags::kWrapVertically));
+  ASSERT_EQ(e3_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapInline |
+                       FocusgroupFlags::kWrapBlock));
+  ASSERT_EQ(e4_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapInline));
+  ASSERT_EQ(e5_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapBlock));
+  ASSERT_EQ(e6_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapInline |
+                       FocusgroupFlags::kWrapBlock));
   ASSERT_EQ(e7_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kRowFlow |
                        FocusgroupFlags::kColFlow));
   ASSERT_EQ(e8_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kRowFlow));
   ASSERT_EQ(e9_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kColFlow));
   ASSERT_EQ(e10_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kRowFlow |
                         FocusgroupFlags::kColFlow));
-  ASSERT_EQ(e11_flags,
-            (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapHorizontally));
-  ASSERT_EQ(e12_flags,
-            (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapHorizontally |
-             FocusgroupFlags::kColFlow));
-  ASSERT_EQ(e13_flags,
-            (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapVertically));
-  ASSERT_EQ(e14_flags,
-            (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapVertically |
-             FocusgroupFlags::kRowFlow));
+  ASSERT_EQ(e11_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapInline));
+  ASSERT_EQ(e12_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapInline |
+                        FocusgroupFlags::kColFlow));
+  ASSERT_EQ(e13_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapBlock));
+  ASSERT_EQ(e14_flags, (FocusgroupFlags::kGrid | FocusgroupFlags::kWrapBlock |
+                        FocusgroupFlags::kRowFlow));
   ASSERT_EQ(e15_flags, FocusgroupFlags::kNone);
-  ASSERT_EQ(e16_flags,
-            (FocusgroupFlags::kHorizontal | FocusgroupFlags::kVertical));
+  ASSERT_EQ(e16_flags, (FocusgroupFlags::kInline | FocusgroupFlags::kBlock));
 }
 
 TEST_F(ElementTest, ParseFocusgroupAttrValueRecomputedAfterDOMStructureChange) {
@@ -1063,8 +1054,8 @@ TEST_F(ElementTest, ParseFocusgroupAttrValueRecomputedAfterDOMStructureChange) {
   FocusgroupFlags fg2_flags = fg2->GetFocusgroupFlags();
   ASSERT_NE(fg2_flags, FocusgroupFlags::kNone);
   ASSERT_TRUE(fg2_flags & FocusgroupFlags::kExtend);
-  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_TRUE(fg2_flags & FocusgroupFlags::kWrapBlock);
 
   auto* fg3 = document.getElementById(AtomicString("fg3"));
   ASSERT_TRUE(fg3);
@@ -1072,8 +1063,8 @@ TEST_F(ElementTest, ParseFocusgroupAttrValueRecomputedAfterDOMStructureChange) {
   FocusgroupFlags fg3_flags = fg3->GetFocusgroupFlags();
   ASSERT_NE(fg3_flags, FocusgroupFlags::kNone);
   ASSERT_TRUE(fg3_flags & FocusgroupFlags::kExtend);
-  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_TRUE(fg3_flags & FocusgroupFlags::kWrapBlock);
 
   // 2. Move |fg2| from |fg1| to |not-fg|.
   auto* not_fg = document.getElementById(AtomicString("not-fg"));
@@ -1086,14 +1077,14 @@ TEST_F(ElementTest, ParseFocusgroupAttrValueRecomputedAfterDOMStructureChange) {
   fg2_flags = fg2->GetFocusgroupFlags();
   ASSERT_NE(fg2_flags, FocusgroupFlags::kNone);
   ASSERT_FALSE(fg2_flags & FocusgroupFlags::kExtend);
-  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg2_flags & FocusgroupFlags::kWrapBlock);
 
   fg3_flags = fg3->GetFocusgroupFlags();
   ASSERT_NE(fg3_flags, FocusgroupFlags::kNone);
   ASSERT_TRUE(fg3_flags & FocusgroupFlags::kExtend);
-  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapHorizontally);
-  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapVertically);
+  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapInline);
+  ASSERT_FALSE(fg3_flags & FocusgroupFlags::kWrapBlock);
 }
 
 TEST_F(ElementTest, ParseFocusgroupAttrValueClearedAfterNodeRemoved) {
diff --git a/third_party/blink/renderer/core/dom/focusgroup_flags.cc b/third_party/blink/renderer/core/dom/focusgroup_flags.cc
index c51236c0ca63b..de9b252e89e74 100644
--- a/third_party/blink/renderer/core/dom/focusgroup_flags.cc
+++ b/third_party/blink/renderer/core/dom/focusgroup_flags.cc
@@ -42,8 +42,8 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
 
   // 1. Parse the input.
   bool has_extend = false;
-  bool has_horizontal = false;
-  bool has_vertical = false;
+  bool has_inline = false;
+  bool has_block = false;
   bool has_grid = false;
   bool has_wrap = false;
   bool has_row_wrap = false;
@@ -58,10 +58,10 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
     AtomicString lowercase_token = tokens[i].LowerASCII();
     if (lowercase_token == "extend") {
       has_extend = true;
-    } else if (lowercase_token == "horizontal") {
-      has_horizontal = true;
-    } else if (lowercase_token == "vertical") {
-      has_vertical = true;
+    } else if (lowercase_token == "inline") {
+      has_inline = true;
+    } else if (lowercase_token == "block") {
+      has_block = true;
     } else if (lowercase_token == "grid") {
       has_grid = true;
     } else if (lowercase_token == "wrap") {
@@ -148,8 +148,7 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
 
     // Set the wrap/flow flags, if specified.
     if (has_wrap) {
-      flags |=
-          FocusgroupFlags::kWrapHorizontally | FocusgroupFlags::kWrapVertically;
+      flags |= FocusgroupFlags::kWrapInline | FocusgroupFlags::kWrapBlock;
       if (has_row_wrap) {
         element->GetDocument().AddConsoleMessage(
             MakeGarbageCollected<ConsoleMessage>(
@@ -170,9 +169,9 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
       }
     } else {
       if (has_row_wrap)
-        flags |= FocusgroupFlags::kWrapHorizontally;
+        flags |= FocusgroupFlags::kWrapInline;
       if (has_col_wrap)
-        flags |= FocusgroupFlags::kWrapVertically;
+        flags |= FocusgroupFlags::kWrapBlock;
 
       if (has_row_wrap && has_col_wrap) {
         element->GetDocument().AddConsoleMessage(
@@ -186,8 +185,8 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
     }
 
     if (has_flow) {
-      if (flags & FocusgroupFlags::kWrapHorizontally ||
-          flags & FocusgroupFlags::kWrapVertically) {
+      if (flags & FocusgroupFlags::kWrapInline ||
+          flags & FocusgroupFlags::kWrapBlock) {
         element->GetDocument().AddConsoleMessage(MakeGarbageCollected<
                                                  ConsoleMessage>(
             mojom::blink::ConsoleMessageSource::kOther,
@@ -218,7 +217,7 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
       }
     } else {
       if (has_row_flow) {
-        if (flags & FocusgroupFlags::kWrapHorizontally) {
+        if (flags & FocusgroupFlags::kWrapInline) {
           element->GetDocument().AddConsoleMessage(
               MakeGarbageCollected<ConsoleMessage>(
                   mojom::blink::ConsoleMessageSource::kOther,
@@ -231,7 +230,7 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
         }
       }
       if (has_col_flow) {
-        if (flags & FocusgroupFlags::kWrapVertically) {
+        if (flags & FocusgroupFlags::kWrapBlock) {
           element->GetDocument().AddConsoleMessage(
               MakeGarbageCollected<ConsoleMessage>(
                   mojom::blink::ConsoleMessageSource::kOther,
@@ -256,22 +255,22 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
     }
 
     // These values are reserved for linear focusgroups.
-    if (has_horizontal) {
+    if (has_inline) {
       element->GetDocument().AddConsoleMessage(
           MakeGarbageCollected<ConsoleMessage>(
               mojom::blink::ConsoleMessageSource::kOther,
               mojom::blink::ConsoleMessageLevel::kError,
               WebString::FromUTF8(
-                  "Focusgroup attribute value 'horizontal' present, "
+                  "Focusgroup attribute value 'inline' present, "
                   "but no has no effect on grid focusgroups.")));
     }
-    if (has_vertical) {
+    if (has_block) {
       element->GetDocument().AddConsoleMessage(
           MakeGarbageCollected<ConsoleMessage>(
               mojom::blink::ConsoleMessageSource::kOther,
               mojom::blink::ConsoleMessageLevel::kError,
               WebString::FromUTF8(
-                  "Focusgroup attribute value 'vertical' present, "
+                  "Focusgroup attribute value 'block' present, "
                   "but no has no effect on grid focusgroups.")));
     }
 
@@ -328,23 +327,26 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
   }
 
   // 4. Set the axis supported on that focusgroup.
-  if (has_horizontal)
-    flags |= FocusgroupFlags::kHorizontal;
-  if (has_vertical)
-    flags |= FocusgroupFlags::kVertical;
+  if (has_inline) {
+    flags |= FocusgroupFlags::kInline;
+  }
+  if (has_block) {
+    flags |= FocusgroupFlags::kBlock;
+  }
 
   // When no axis is specified, it means that the focusgroup should handle
   // both.
-  if (!has_horizontal && !has_vertical)
-    flags |= FocusgroupFlags::kHorizontal | FocusgroupFlags::kVertical;
+  if (!has_inline && !has_block) {
+    flags |= FocusgroupFlags::kInline | FocusgroupFlags::kBlock;
+  }
 
-  if (has_horizontal && has_vertical) {
+  if (has_inline && has_block) {
     element->GetDocument().AddConsoleMessage(
         MakeGarbageCollected<ConsoleMessage>(
             mojom::blink::ConsoleMessageSource::kOther,
             mojom::blink::ConsoleMessageLevel::kWarning,
             WebString::FromUTF8(
-                "'horizontal' and 'vertical' focusgroup attribute values used "
+                "'inline' and 'block' focusgroup attribute values used "
                 "together are redundant (this is the default behavior) and can "
                 "be omitted.")));
   }
@@ -353,18 +355,18 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
   // performed once the supported axes are final.
   if (has_wrap) {
     if (flags & FocusgroupFlags::kExtend) {
-      bool extends_horizontally = flags & FocusgroupFlags::kHorizontal &&
-                                  ancestor_flags & FocusgroupFlags::kHorizontal;
-      if (!extends_horizontally && flags & FocusgroupFlags::kHorizontal) {
-        flags |= FocusgroupFlags::kWrapHorizontally;
+      bool extends_inline = flags & FocusgroupFlags::kInline &&
+                            ancestor_flags & FocusgroupFlags::kInline;
+      if (!extends_inline && flags & FocusgroupFlags::kInline) {
+        flags |= FocusgroupFlags::kWrapInline;
       }
-      bool extends_vertically = flags & FocusgroupFlags::kVertical &&
-                                ancestor_flags & FocusgroupFlags::kVertical;
-      if (!extends_vertically && flags & FocusgroupFlags::kVertical) {
-        flags |= FocusgroupFlags::kWrapVertically;
+      bool extends_block = flags & FocusgroupFlags::kBlock &&
+                           ancestor_flags & FocusgroupFlags::kBlock;
+      if (!extends_block && flags & FocusgroupFlags::kBlock) {
+        flags |= FocusgroupFlags::kWrapBlock;
       }
 
-      if (extends_horizontally && extends_vertically) {
+      if (extends_inline && extends_block) {
         element->GetDocument().AddConsoleMessage(MakeGarbageCollected<
                                                  ConsoleMessage>(
             mojom::blink::ConsoleMessageSource::kOther,
@@ -375,10 +377,12 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
                 "one in both axes.")));
       }
     } else {
-      if (flags & FocusgroupFlags::kHorizontal)
-        flags |= FocusgroupFlags::kWrapHorizontally;
-      if (flags & FocusgroupFlags::kVertical)
-        flags |= FocusgroupFlags::kWrapVertically;
+      if (flags & FocusgroupFlags::kInline) {
+        flags |= FocusgroupFlags::kWrapInline;
+      }
+      if (flags & FocusgroupFlags::kBlock) {
+        flags |= FocusgroupFlags::kWrapBlock;
+      }
     }
   }
 
@@ -386,10 +390,10 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
   // for the descendant's supported axes.
   if (flags & FocusgroupFlags::kExtend) {
     DCHECK(ancestor_flags != FocusgroupFlags::kNone);
-    if ((flags & FocusgroupFlags::kWrapHorizontally) ==
-            (ancestor_flags & FocusgroupFlags::kWrapHorizontally) &&
-        (flags & FocusgroupFlags::kWrapVertically) ==
-            (ancestor_flags & FocusgroupFlags::kWrapVertically)) {
+    if ((flags & FocusgroupFlags::kWrapInline) ==
+            (ancestor_flags & FocusgroupFlags::kWrapInline) &&
+        (flags & FocusgroupFlags::kWrapBlock) ==
+            (ancestor_flags & FocusgroupFlags::kWrapBlock)) {
       element->GetDocument().AddConsoleMessage(MakeGarbageCollected<
                                                ConsoleMessage>(
           mojom::blink::ConsoleMessageSource::kOther,
@@ -398,10 +402,12 @@ FocusgroupFlags ParseFocusgroup(const Element* element,
               "Focusgroup attribute value 'wrap' present but ignored. 'wrap' "
               "is inherited from the extended parent focusgroup.")));
     }
-    if (flags & FocusgroupFlags::kHorizontal)
-      flags |= (ancestor_flags & FocusgroupFlags::kWrapHorizontally);
-    if (flags & FocusgroupFlags::kVertical)
-      flags |= (ancestor_flags & FocusgroupFlags::kWrapVertically);
+    if (flags & FocusgroupFlags::kInline) {
+      flags |= (ancestor_flags & FocusgroupFlags::kWrapInline);
+    }
+    if (flags & FocusgroupFlags::kBlock) {
+      flags |= (ancestor_flags & FocusgroupFlags::kWrapBlock);
+    }
   }
 
   return flags;
diff --git a/third_party/blink/renderer/core/dom/focusgroup_flags.h b/third_party/blink/renderer/core/dom/focusgroup_flags.h
index 2f3e3d6d268c2..a6a2bc2a02138 100644
--- a/third_party/blink/renderer/core/dom/focusgroup_flags.h
+++ b/third_party/blink/renderer/core/dom/focusgroup_flags.h
@@ -17,11 +17,11 @@ namespace focusgroup {
 enum FocusgroupFlags : uint8_t {
   kNone = 0,
   kExtend = 1 << 0,
-  kHorizontal = 1 << 1,
-  kVertical = 1 << 2,
+  kInline = 1 << 1,
+  kBlock = 1 << 2,
   kGrid = 1 << 3,
-  kWrapHorizontally = 1 << 4,
-  kWrapVertically = 1 << 5,
+  kWrapInline = 1 << 4,
+  kWrapBlock = 1 << 5,
   kRowFlow = 1 << 6,
   kColFlow = 1 << 7,
 };
diff --git a/third_party/blink/renderer/core/page/focusgroup_controller.cc b/third_party/blink/renderer/core/page/focusgroup_controller.cc
index 58ed731cb1648..d60c701c3c78d 100644
--- a/third_party/blink/renderer/core/page/focusgroup_controller.cc
+++ b/third_party/blink/renderer/core/page/focusgroup_controller.cc
@@ -452,16 +452,16 @@ bool FocusgroupController::AdvanceInGrid(Element* initial_element,
     // 1. Move to the next cell in the appropriate |direction|.
     Element* previous = current;
     switch (direction) {
-      case FocusgroupDirection::kBackwardHorizontal:
+      case FocusgroupDirection::kBackwardInline:
         current = helper->PreviousCellInRow(current);
         break;
-      case FocusgroupDirection::kForwardHorizontal:
+      case FocusgroupDirection::kForwardInline:
         current = helper->NextCellInRow(current);
         break;
-      case FocusgroupDirection::kBackwardVertical:
+      case FocusgroupDirection::kBackwardBlock:
         current = helper->PreviousCellInColumn(current);
         break;
-      case FocusgroupDirection::kForwardVertical:
+      case FocusgroupDirection::kForwardBlock:
         current = helper->NextCellInColumn(current);
         break;
       default:
@@ -506,9 +506,9 @@ Element* FocusgroupController::WrapOrFlowInGrid(
   FocusgroupFlags flags = helper->Root()->GetFocusgroupFlags();
 
   switch (direction) {
-    case FocusgroupDirection::kBackwardHorizontal:
+    case FocusgroupDirection::kBackwardInline:
       // This is only possible when on the first cell within a row.
-      if (flags & FocusgroupFlags::kWrapHorizontally) {
+      if (flags & FocusgroupFlags::kWrapInline) {
         // Wrapping backward in a row means that we should move the focus to the
         // last cell in the same row.
         Element* row = helper->RowForCell(element);
@@ -527,9 +527,9 @@ Element* FocusgroupController::WrapOrFlowInGrid(
       }
       break;
 
-    case FocusgroupDirection::kForwardHorizontal:
+    case FocusgroupDirection::kForwardInline:
       // This is only possible when on the last cell within a row.
-      if (flags & FocusgroupFlags::kWrapHorizontally) {
+      if (flags & FocusgroupFlags::kWrapInline) {
         // Wrapping forward in a row means that we should move the focus to the
         // first cell of the same row.
         Element* row = helper->RowForCell(element);
@@ -548,9 +548,9 @@ Element* FocusgroupController::WrapOrFlowInGrid(
       }
       break;
 
-    case FocusgroupDirection::kBackwardVertical:
+    case FocusgroupDirection::kBackwardBlock:
       // This is only possible when on the first cell within a column.
-      if (flags & FocusgroupFlags::kWrapVertically) {
+      if (flags & FocusgroupFlags::kWrapBlock) {
         // Wrapping backward in a column means that we should move the focus to
         // the last cell in the same column.
         unsigned cell_index = helper->ColumnIndexForCell(element);
@@ -567,9 +567,9 @@ Element* FocusgroupController::WrapOrFlowInGrid(
       }
       break;
 
-    case FocusgroupDirection::kForwardVertical:
+    case FocusgroupDirection::kForwardBlock:
       // This is only possible when on the last cell within a column.
-      if (flags & FocusgroupFlags::kWrapVertically) {
+      if (flags & FocusgroupFlags::kWrapBlock) {
         // Wrapping forward in a column means that we should move the focus to
         // first cell in the same column.
         unsigned cell_index = helper->ColumnIndexForCell(element);
diff --git a/third_party/blink/renderer/core/page/focusgroup_controller_test.cc b/third_party/blink/renderer/core/page/focusgroup_controller_test.cc
index abb9f739f610f..ef2db212923c4 100644
--- a/third_party/blink/renderer/core/page/focusgroup_controller_test.cc
+++ b/third_party/blink/renderer/core/page/focusgroup_controller_test.cc
@@ -53,25 +53,25 @@ class FocusgroupControllerTest : public PageTestBase {
 };
 
 TEST_F(FocusgroupControllerTest, FocusgroupDirectionForEventValid) {
-  // Arrow right should be forward and horizontal.
+  // Arrow right should be forward and inline.
   auto* event = KeyDownEvent(ui::DomKey::ARROW_RIGHT);
   EXPECT_EQ(utils::FocusgroupDirectionForEvent(event),
-            FocusgroupDirection::kForwardHorizontal);
+            FocusgroupDirection::kForwardInline);
 
-  // Arrow down should be forward and vertical.
+  // Arrow down should be forward and block.
   event = KeyDownEvent(ui::DomKey::ARROW_DOWN);
   EXPECT_EQ(utils::FocusgroupDirectionForEvent(event),
-            FocusgroupDirection::kForwardVertical);
+            FocusgroupDirection::kForwardBlock);
 
-  // Arrow left should be backward and horizontal.
+  // Arrow left should be backward and inline.
   event = KeyDownEvent(ui::DomKey::ARROW_LEFT);
   EXPECT_EQ(utils::FocusgroupDirectionForEvent(event),
-            FocusgroupDirection::kBackwardHorizontal);
+            FocusgroupDirection::kBackwardInline);
 
-  // Arrow up should be backward and vertical.
+  // Arrow up should be backward and block.
   event = KeyDownEvent(ui::DomKey::ARROW_UP);
   EXPECT_EQ(utils::FocusgroupDirectionForEvent(event),
-            FocusgroupDirection::kBackwardVertical);
+            FocusgroupDirection::kBackwardBlock);
 
   // When the shift key is pressed, even when combined with a valid arrow key,
   // it should return kNone.
@@ -100,139 +100,124 @@ TEST_F(FocusgroupControllerTest, FocusgroupDirectionForEventValid) {
 
 TEST_F(FocusgroupControllerTest, IsDirectionBackward) {
   ASSERT_FALSE(utils::IsDirectionBackward(FocusgroupDirection::kNone));
-  ASSERT_TRUE(
-      utils::IsDirectionBackward(FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_TRUE(
-      utils::IsDirectionBackward(FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(
-      utils::IsDirectionBackward(FocusgroupDirection::kForwardHorizontal));
-  ASSERT_FALSE(
-      utils::IsDirectionBackward(FocusgroupDirection::kForwardVertical));
+  ASSERT_TRUE(utils::IsDirectionBackward(FocusgroupDirection::kBackwardInline));
+  ASSERT_TRUE(utils::IsDirectionBackward(FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::IsDirectionBackward(FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::IsDirectionBackward(FocusgroupDirection::kForwardBlock));
 }
 
 TEST_F(FocusgroupControllerTest, IsDirectionForward) {
   ASSERT_FALSE(utils::IsDirectionForward(FocusgroupDirection::kNone));
-  ASSERT_FALSE(
-      utils::IsDirectionForward(FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(
-      utils::IsDirectionForward(FocusgroupDirection::kBackwardVertical));
-  ASSERT_TRUE(
-      utils::IsDirectionForward(FocusgroupDirection::kForwardHorizontal));
-  ASSERT_TRUE(utils::IsDirectionForward(FocusgroupDirection::kForwardVertical));
+  ASSERT_FALSE(utils::IsDirectionForward(FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::IsDirectionForward(FocusgroupDirection::kBackwardBlock));
+  ASSERT_TRUE(utils::IsDirectionForward(FocusgroupDirection::kForwardInline));
+  ASSERT_TRUE(utils::IsDirectionForward(FocusgroupDirection::kForwardBlock));
 }
 
-TEST_F(FocusgroupControllerTest, IsDirectionHorizontal) {
-  ASSERT_FALSE(utils::IsDirectionHorizontal(FocusgroupDirection::kNone));
-  ASSERT_TRUE(
-      utils::IsDirectionHorizontal(FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(
-      utils::IsDirectionHorizontal(FocusgroupDirection::kBackwardVertical));
-  ASSERT_TRUE(
-      utils::IsDirectionHorizontal(FocusgroupDirection::kForwardHorizontal));
-  ASSERT_FALSE(
-      utils::IsDirectionHorizontal(FocusgroupDirection::kForwardVertical));
+TEST_F(FocusgroupControllerTest, IsDirectionInline) {
+  ASSERT_FALSE(utils::IsDirectionInline(FocusgroupDirection::kNone));
+  ASSERT_TRUE(utils::IsDirectionInline(FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::IsDirectionInline(FocusgroupDirection::kBackwardBlock));
+  ASSERT_TRUE(utils::IsDirectionInline(FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::IsDirectionInline(FocusgroupDirection::kForwardBlock));
 }
 
-TEST_F(FocusgroupControllerTest, IsDirectionVertical) {
-  ASSERT_FALSE(utils::IsDirectionVertical(FocusgroupDirection::kNone));
-  ASSERT_FALSE(
-      utils::IsDirectionVertical(FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_TRUE(
-      utils::IsDirectionVertical(FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(
-      utils::IsDirectionVertical(FocusgroupDirection::kForwardHorizontal));
-  ASSERT_TRUE(
-      utils::IsDirectionVertical(FocusgroupDirection::kForwardVertical));
+TEST_F(FocusgroupControllerTest, IsDirectionBlock) {
+  ASSERT_FALSE(utils::IsDirectionBlock(FocusgroupDirection::kNone));
+  ASSERT_FALSE(utils::IsDirectionBlock(FocusgroupDirection::kBackwardInline));
+  ASSERT_TRUE(utils::IsDirectionBlock(FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::IsDirectionBlock(FocusgroupDirection::kForwardInline));
+  ASSERT_TRUE(utils::IsDirectionBlock(FocusgroupDirection::kForwardBlock));
 }
 
 TEST_F(FocusgroupControllerTest, IsAxisSupported) {
-  FocusgroupFlags flags_horizontal_only = FocusgroupFlags::kHorizontal;
-  ASSERT_FALSE(utils::IsAxisSupported(flags_horizontal_only,
-                                      FocusgroupDirection::kNone));
-  ASSERT_TRUE(utils::IsAxisSupported(flags_horizontal_only,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(utils::IsAxisSupported(flags_horizontal_only,
-                                      FocusgroupDirection::kBackwardVertical));
-  ASSERT_TRUE(utils::IsAxisSupported(flags_horizontal_only,
-                                     FocusgroupDirection::kForwardHorizontal));
-  ASSERT_FALSE(utils::IsAxisSupported(flags_horizontal_only,
-                                      FocusgroupDirection::kForwardVertical));
-
-  FocusgroupFlags flags_vertical_only = FocusgroupFlags::kVertical;
+  FocusgroupFlags flags_inline_only = FocusgroupFlags::kInline;
   ASSERT_FALSE(
-      utils::IsAxisSupported(flags_vertical_only, FocusgroupDirection::kNone));
-  ASSERT_FALSE(utils::IsAxisSupported(
-      flags_vertical_only, FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_TRUE(utils::IsAxisSupported(flags_vertical_only,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(utils::IsAxisSupported(flags_vertical_only,
-                                      FocusgroupDirection::kForwardHorizontal));
-  ASSERT_TRUE(utils::IsAxisSupported(flags_vertical_only,
-                                     FocusgroupDirection::kForwardVertical));
+      utils::IsAxisSupported(flags_inline_only, FocusgroupDirection::kNone));
+  ASSERT_TRUE(utils::IsAxisSupported(flags_inline_only,
+                                     FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::IsAxisSupported(flags_inline_only,
+                                      FocusgroupDirection::kBackwardBlock));
+  ASSERT_TRUE(utils::IsAxisSupported(flags_inline_only,
+                                     FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::IsAxisSupported(flags_inline_only,
+                                      FocusgroupDirection::kForwardBlock));
+
+  FocusgroupFlags flags_block_only = FocusgroupFlags::kBlock;
+  ASSERT_FALSE(
+      utils::IsAxisSupported(flags_block_only, FocusgroupDirection::kNone));
+  ASSERT_FALSE(utils::IsAxisSupported(flags_block_only,
+                                      FocusgroupDirection::kBackwardInline));
+  ASSERT_TRUE(utils::IsAxisSupported(flags_block_only,
+                                     FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::IsAxisSupported(flags_block_only,
+                                      FocusgroupDirection::kForwardInline));
+  ASSERT_TRUE(utils::IsAxisSupported(flags_block_only,
+                                     FocusgroupDirection::kForwardBlock));
 
   FocusgroupFlags flags_both_directions =
-      FocusgroupFlags::kHorizontal | FocusgroupFlags::kVertical;
+      FocusgroupFlags::kInline | FocusgroupFlags::kBlock;
   ASSERT_FALSE(utils::IsAxisSupported(flags_both_directions,
                                       FocusgroupDirection::kNone));
   ASSERT_TRUE(utils::IsAxisSupported(flags_both_directions,
-                                     FocusgroupDirection::kBackwardHorizontal));
+                                     FocusgroupDirection::kBackwardInline));
   ASSERT_TRUE(utils::IsAxisSupported(flags_both_directions,
-                                     FocusgroupDirection::kBackwardVertical));
+                                     FocusgroupDirection::kBackwardBlock));
   ASSERT_TRUE(utils::IsAxisSupported(flags_both_directions,
-                                     FocusgroupDirection::kForwardHorizontal));
+                                     FocusgroupDirection::kForwardInline));
   ASSERT_TRUE(utils::IsAxisSupported(flags_both_directions,
-                                     FocusgroupDirection::kForwardVertical));
+                                     FocusgroupDirection::kForwardBlock));
 }
 
 TEST_F(FocusgroupControllerTest, WrapsInDirection) {
   FocusgroupFlags flags_no_wrap = FocusgroupFlags::kNone;
   ASSERT_FALSE(
       utils::WrapsInDirection(flags_no_wrap, FocusgroupDirection::kNone));
-  ASSERT_FALSE(utils::WrapsInDirection(
-      flags_no_wrap, FocusgroupDirection::kBackwardHorizontal));
   ASSERT_FALSE(utils::WrapsInDirection(flags_no_wrap,
-                                       FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(utils::WrapsInDirection(
-      flags_no_wrap, FocusgroupDirection::kForwardHorizontal));
+                                       FocusgroupDirection::kBackwardInline));
   ASSERT_FALSE(utils::WrapsInDirection(flags_no_wrap,
-                                       FocusgroupDirection::kForwardVertical));
+                                       FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::WrapsInDirection(flags_no_wrap,
+                                       FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::WrapsInDirection(flags_no_wrap,
+                                       FocusgroupDirection::kForwardBlock));
 
-  FocusgroupFlags flags_wrap_horizontal = FocusgroupFlags::kWrapHorizontally;
-  ASSERT_FALSE(utils::WrapsInDirection(flags_wrap_horizontal,
-                                       FocusgroupDirection::kNone));
-  ASSERT_TRUE(utils::WrapsInDirection(
-      flags_wrap_horizontal, FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(utils::WrapsInDirection(flags_wrap_horizontal,
-                                       FocusgroupDirection::kBackwardVertical));
-  ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_horizontal,
-                                      FocusgroupDirection::kForwardHorizontal));
-  ASSERT_FALSE(utils::WrapsInDirection(flags_wrap_horizontal,
-                                       FocusgroupDirection::kForwardVertical));
-
-  FocusgroupFlags flags_wrap_vertical = FocusgroupFlags::kWrapVertically;
+  FocusgroupFlags flags_wrap_inline = FocusgroupFlags::kWrapInline;
   ASSERT_FALSE(
-      utils::WrapsInDirection(flags_wrap_vertical, FocusgroupDirection::kNone));
-  ASSERT_FALSE(utils::WrapsInDirection(
-      flags_wrap_vertical, FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_vertical,
-                                      FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(utils::WrapsInDirection(
-      flags_wrap_vertical, FocusgroupDirection::kForwardHorizontal));
-  ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_vertical,
-                                      FocusgroupDirection::kForwardVertical));
+      utils::WrapsInDirection(flags_wrap_inline, FocusgroupDirection::kNone));
+  ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_inline,
+                                      FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::WrapsInDirection(flags_wrap_inline,
+                                       FocusgroupDirection::kBackwardBlock));
+  ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_inline,
+                                      FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::WrapsInDirection(flags_wrap_inline,
+                                       FocusgroupDirection::kForwardBlock));
+
+  FocusgroupFlags flags_wrap_block = FocusgroupFlags::kWrapBlock;
+  ASSERT_FALSE(
+      utils::WrapsInDirection(flags_wrap_block, FocusgroupDirection::kNone));
+  ASSERT_FALSE(utils::WrapsInDirection(flags_wrap_block,
+                                       FocusgroupDirection::kBackwardInline));
+  ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_block,
+                                      FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::WrapsInDirection(flags_wrap_block,
+                                       FocusgroupDirection::kForwardInline));
+  ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_block,
+                                      FocusgroupDirection::kForwardBlock));
 
   FocusgroupFlags flags_wrap_both =
-      FocusgroupFlags::kWrapHorizontally | FocusgroupFlags::kWrapVertically;
+      FocusgroupFlags::kWrapInline | FocusgroupFlags::kWrapBlock;
   ASSERT_FALSE(
       utils::WrapsInDirection(flags_wrap_both, FocusgroupDirection::kNone));
-  ASSERT_TRUE(utils::WrapsInDirection(
-      flags_wrap_both, FocusgroupDirection::kBackwardHorizontal));
   ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_both,
-                                      FocusgroupDirection::kBackwardVertical));
+                                      FocusgroupDirection::kBackwardInline));
   ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_both,
-                                      FocusgroupDirection::kForwardHorizontal));
+                                      FocusgroupDirection::kBackwardBlock));
   ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_both,
-                                      FocusgroupDirection::kForwardVertical));
+                                      FocusgroupDirection::kForwardInline));
+  ASSERT_TRUE(utils::WrapsInDirection(flags_wrap_both,
+                                      FocusgroupDirection::kForwardBlock));
 }
 
 TEST_F(FocusgroupControllerTest, FocusgroupExtendsInAxis) {
@@ -241,149 +226,120 @@ TEST_F(FocusgroupControllerTest, FocusgroupExtendsInAxis) {
 
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
                                               FocusgroupDirection::kNone));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
 
-  focusgroup |= FocusgroupFlags::kHorizontal | FocusgroupFlags::kVertical;
+  focusgroup |= FocusgroupFlags::kInline | FocusgroupFlags::kBlock;
 
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
                                               FocusgroupDirection::kNone));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
 
-  extending_focusgroup |=
-      FocusgroupFlags::kHorizontal | FocusgroupFlags::kVertical;
+  extending_focusgroup |= FocusgroupFlags::kInline | FocusgroupFlags::kBlock;
 
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
                                               FocusgroupDirection::kNone));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
 
   extending_focusgroup = FocusgroupFlags::kExtend;
 
   ASSERT_TRUE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
                                              FocusgroupDirection::kNone));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
 
-  extending_focusgroup |= FocusgroupFlags::kHorizontal;
+  extending_focusgroup |= FocusgroupFlags::kInline;
 
   ASSERT_TRUE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
                                              FocusgroupDirection::kNone));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
-  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
-
-  extending_focusgroup |= FocusgroupFlags::kVertical;
-
-  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                             FocusgroupDirection::kNone));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
   ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
+
+  extending_focusgroup |= FocusgroupFlags::kBlock;
+
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
+                                             FocusgroupDirection::kNone));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
 
   focusgroup = FocusgroupFlags::kNone;
-  extending_focusgroup = FocusgroupFlags::kExtend |
-                         FocusgroupFlags::kHorizontal |
-                         FocusgroupFlags::kVertical;
+  extending_focusgroup = FocusgroupFlags::kExtend | FocusgroupFlags::kInline |
+                         FocusgroupFlags::kBlock;
 
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
                                               FocusgroupDirection::kNone));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
   ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
 
-  focusgroup |= FocusgroupFlags::kVertical;
+  focusgroup |= FocusgroupFlags::kBlock;
 
   ASSERT_TRUE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
                                              FocusgroupDirection::kNone));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_FALSE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
   ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_FALSE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
 
-  focusgroup |= FocusgroupFlags::kHorizontal;
+  focusgroup |= FocusgroupFlags::kInline;
 
   ASSERT_TRUE(utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
                                              FocusgroupDirection::kNone));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardHorizontal));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kBackwardVertical));
-  ASSERT_TRUE(
-      utils::FocusgroupExtendsInAxis(extending_focusgroup, focusgroup,
-                                     FocusgroupDirection::kForwardHorizontal));
   ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
-      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardVertical));
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardInline));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kBackwardBlock));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardInline));
+  ASSERT_TRUE(utils::FocusgroupExtendsInAxis(
+      extending_focusgroup, focusgroup, FocusgroupDirection::kForwardBlock));
 }
 
 TEST_F(FocusgroupControllerTest, FindNearestFocusgroupAncestor) {
diff --git a/third_party/blink/renderer/core/page/focusgroup_controller_utils.cc b/third_party/blink/renderer/core/page/focusgroup_controller_utils.cc
index c85db2b127229..be5284fe673e0 100644
--- a/third_party/blink/renderer/core/page/focusgroup_controller_utils.cc
+++ b/third_party/blink/renderer/core/page/focusgroup_controller_utils.cc
@@ -23,56 +23,53 @@ FocusgroupDirection FocusgroupControllerUtils::FocusgroupDirectionForEvent(
   // TODO(bebeaudr): Support RTL. Will it be as simple as inverting the
   // direction associated with the left and right arrows when in a RTL element?
   if (event->key() == "ArrowDown")
-    return FocusgroupDirection::kForwardVertical;
+    return FocusgroupDirection::kForwardBlock;
   else if (event->key() == "ArrowRight")
-    return FocusgroupDirection::kForwardHorizontal;
+    return FocusgroupDirection::kForwardInline;
   else if (event->key() == "ArrowUp")
-    return FocusgroupDirection::kBackwardVertical;
+    return FocusgroupDirection::kBackwardBlock;
   else if (event->key() == "ArrowLeft")
-    return FocusgroupDirection::kBackwardHorizontal;
+    return FocusgroupDirection::kBackwardInline;
 
   return FocusgroupDirection::kNone;
 }
 
 bool FocusgroupControllerUtils::IsDirectionForward(
     FocusgroupDirection direction) {
-  return direction == FocusgroupDirection::kForwardHorizontal ||
-         direction == FocusgroupDirection::kForwardVertical;
+  return direction == FocusgroupDirection::kForwardInline ||
+         direction == FocusgroupDirection::kForwardBlock;
 }
 
 bool FocusgroupControllerUtils::IsDirectionBackward(
     FocusgroupDirection direction) {
-  return direction == FocusgroupDirection::kBackwardHorizontal ||
-         direction == FocusgroupDirection::kBackwardVertical;
+  return direction == FocusgroupDirection::kBackwardInline ||
+         direction == FocusgroupDirection::kBackwardBlock;
 }
 
-bool FocusgroupControllerUtils::IsDirectionHorizontal(
+bool FocusgroupControllerUtils::IsDirectionInline(
     FocusgroupDirection direction) {
-  return direction == FocusgroupDirection::kBackwardHorizontal ||
-         direction == FocusgroupDirection::kForwardHorizontal;
+  return direction == FocusgroupDirection::kBackwardInline ||
+         direction == FocusgroupDirection::kForwardInline;
 }
 
-bool FocusgroupControllerUtils::IsDirectionVertical(
+bool FocusgroupControllerUtils::IsDirectionBlock(
     FocusgroupDirection direction) {
-  return direction == FocusgroupDirection::kBackwardVertical ||
-         direction == FocusgroupDirection::kForwardVertical;
+  return direction == FocusgroupDirection::kBackwardBlock ||
+         direction == FocusgroupDirection::kForwardBlock;
 }
 
 bool FocusgroupControllerUtils::IsAxisSupported(FocusgroupFlags flags,
                                                 FocusgroupDirection direction) {
-  return ((flags & FocusgroupFlags::kHorizontal) &&
-          IsDirectionHorizontal(direction)) ||
-         ((flags & FocusgroupFlags::kVertical) &&
-          IsDirectionVertical(direction));
+  return ((flags & FocusgroupFlags::kInline) && IsDirectionInline(direction)) ||
+         ((flags & FocusgroupFlags::kBlock) && IsDirectionBlock(direction));
 }
 
 bool FocusgroupControllerUtils::WrapsInDirection(
     FocusgroupFlags flags,
     FocusgroupDirection direction) {
-  return ((flags & FocusgroupFlags::kWrapHorizontally) &&
-          IsDirectionHorizontal(direction)) ||
-         ((flags & FocusgroupFlags::kWrapVertically) &&
-          IsDirectionVertical(direction));
+  return ((flags & FocusgroupFlags::kWrapInline) &&
+          IsDirectionInline(direction)) ||
+         ((flags & FocusgroupFlags::kWrapBlock) && IsDirectionBlock(direction));
 }
 
 bool FocusgroupControllerUtils::FocusgroupExtendsInAxis(
diff --git a/third_party/blink/renderer/core/page/focusgroup_controller_utils.h b/third_party/blink/renderer/core/page/focusgroup_controller_utils.h
index 415f0c6c9f020..5af34b6fb10d2 100644
--- a/third_party/blink/renderer/core/page/focusgroup_controller_utils.h
+++ b/third_party/blink/renderer/core/page/focusgroup_controller_utils.h
@@ -17,10 +17,10 @@ class KeyboardEvent;
 
 enum class FocusgroupDirection {
   kNone,
-  kBackwardHorizontal,
-  kBackwardVertical,
-  kForwardHorizontal,
-  kForwardVertical,
+  kBackwardInline,
+  kBackwardBlock,
+  kForwardInline,
+  kForwardBlock,
 };
 
 enum class FocusgroupType {
@@ -35,8 +35,8 @@ class CORE_EXPORT FocusgroupControllerUtils {
   static FocusgroupDirection FocusgroupDirectionForEvent(KeyboardEvent* event);
   static bool IsDirectionBackward(FocusgroupDirection direction);
   static bool IsDirectionForward(FocusgroupDirection direction);
-  static bool IsDirectionHorizontal(FocusgroupDirection direction);
-  static bool IsDirectionVertical(FocusgroupDirection direction);
+  static bool IsDirectionInline(FocusgroupDirection direction);
+  static bool IsDirectionBlock(FocusgroupDirection direction);
   static bool IsAxisSupported(FocusgroupFlags flags,
                               FocusgroupDirection direction);
   static bool WrapsInDirection(FocusgroupFlags flags,
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/ascends-to-parent-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/ascends-to-parent-focusgroup.html
index 00ef3db90c58b..e77fc866411b2 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/ascends-to-parent-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/ascends-to-parent-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus ascends to parent focusgroup successfully.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,11 +10,11 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div focusgroup=horizontal>
+<div focusgroup=inline>
   <span id=item1 tabindex=0>item1</span>
   <div id=item2 tabindex=-1>
     <div>
-      <div focusgroup="extend vertical">
+      <div focusgroup="extend block">
         <span id=item3 tabindex=-1>item3</span>
         <span id=item4 tabindex=-1>item4</span>
       </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-ascend-out-of-non-extending-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-ascend-out-of-non-extending-focusgroup.html
index b00958719d5a2..f30e40783f969 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-ascend-out-of-non-extending-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-ascend-out-of-non-extending-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus does not ascend out of current focusgroup if it does not extend the parent focusgroup.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,9 +10,9 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<ul focusgroup=horizontal>
+<ul focusgroup=inline>
   <li id=item1 tabindex="-1">
-    <ul focusgroup=vertical>
+    <ul focusgroup=block>
       <li id=item2 tabindex="-1">item2</li>
     </ul>
   </li>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-move-when-axis-not-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-move-when-axis-not-supported.html
index e671a25844342..2b116c7012575 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-move-when-axis-not-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-move-when-axis-not-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus does not move to previous focusgroup item when the axis of the arrow key pressed isn't supported.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup=vertical>
+<div id=root focusgroup=block>
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-wrap-in-orthogonal-axis.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-wrap-in-orthogonal-axis.html
index de09fa813c60f..2c95bc24841ff 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-wrap-in-orthogonal-axis.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/does-not-wrap-in-orthogonal-axis.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus does not wrap in the arrow key pressed orthogonal axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div focusgroup="vertical wrap">
+<div focusgroup="block wrap">
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
   <span id=item3 tabindex=-1>item3</span>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/moves-when-only-current-axis-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/moves-when-only-current-axis-supported.html
index 12f793486699b..a61aabe949b38 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/moves-when-only-current-axis-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/moves-when-only-current-axis-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to previous focusgroup item when only the axis of the arrow key pressed is supported.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup=horizontal>
+<div id=root focusgroup=inline>
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis-complex-case.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis-complex-case.html
index 2fadddac272af..917c8cce0d325 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis-complex-case.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis-complex-case.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to previous item, skipping the focusgroup that extends in the orthogonal axis (complex case).</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -13,7 +13,7 @@
 <div focusgroup=wrap>
   <span id=item1 tabindex=0>item1</span>
   <div>
-    <div focusgroup="extend vertical">
+    <div focusgroup="extend block">
       <div id=item2 tabindex=-1>
         <div focusgroup=extend>
           <span id=item3 tabindex=-1>item3</span>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis.html
index 44dace84614cd..8c6c7b2a3efad 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to previous item, skipping the focusgroup that extends in the orthogonal axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -13,7 +13,7 @@
 <div focusgroup=wrap>
   <span id=item1 tabindex=0>item1</span>
   <div>
-    <div focusgroup="extending vertical">
+    <div focusgroup="extend block">
       <span id=item2 tabindex=-1>item2</span>
       <span id=item3 tabindex=-1>item3</span>
     </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/wraps-in-axis.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/wraps-in-axis.html
index 956d3f640635f..5be26b93a1a7f 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/wraps-in-axis.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/horizontal/wraps-in-axis.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus wraps in the arrow key pressed axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div focusgroup="horizontal wrap">
+<div focusgroup="inline wrap">
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
   <span id=item3 tabindex=-1>item3</span>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/ascends-to-parent-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/ascends-to-parent-focusgroup.html
index b95f2c527bca5..2f9e3016237a6 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/ascends-to-parent-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/ascends-to-parent-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus ascends to parent focusgroup successfully.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,11 +10,11 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div focusgroup=vertical>
+<div focusgroup=block>
   <span id=item1 tabindex=0>item1</span>
   <div id=item2 tabindex=-1>
     <div>
-      <div focusgroup="extend horizontal">
+      <div focusgroup="extend inline">
         <span id=item3 tabindex=-1>item3</span>
         <span id=item4 tabindex=-1>item4</span>
       </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-ascend-out-of-non-extending-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-ascend-out-of-non-extending-focusgroup.html
index 08dc466603354..407db648facd0 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-ascend-out-of-non-extending-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-ascend-out-of-non-extending-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus does not ascend out of current focusgroup if it does not extend the parent focusgroup.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,9 +10,9 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<ul focusgroup=vertical>
+<ul focusgroup=block>
   <li id=item1 tabindex="-1">
-    <ul focusgroup=horizontal>
+    <ul focusgroup=inline>
       <li id=item2 tabindex="-1">item2</li>
     </ul>
   </li>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-move-when-axis-not-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-move-when-axis-not-supported.html
index 0cf6ad3be23ec..c9a6ec5ddee1b 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-move-when-axis-not-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-move-when-axis-not-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus does not move to previous focusgroup item when the axis of the arrow key pressed isn't supported.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup=horizontal>
+<div id=root focusgroup=inline>
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-wrap-in-orthogonal-axis.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-wrap-in-orthogonal-axis.html
index 0ec4f0224761b..9bb5cc1c88503 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-wrap-in-orthogonal-axis.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/does-not-wrap-in-orthogonal-axis.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus does not wrap in the arrow key pressed orthogonal axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div focusgroup="horizontal wrap">
+<div focusgroup="inline wrap">
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
   <span id=item3 tabindex=-1>item3</span>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/moves-when-only-current-axis-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/moves-when-only-current-axis-supported.html
index ad46be76b29e9..efe3b458f59a3 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/moves-when-only-current-axis-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/moves-when-only-current-axis-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to previous focusgroup item when only the axis of the arrow key pressed is supported.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup=vertical>
+<div id=root focusgroup=block>
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis-complex-case.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis-complex-case.html
index 86ea79122cf14..5b66b5b00ea9c 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis-complex-case.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis-complex-case.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to previous item, skipping the focusgroup that extends in the orthogonal axis (complex case).</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -13,7 +13,7 @@
 <div focusgroup=wrap>
   <span id=item1 tabindex=0>item1</span>
   <div>
-    <div focusgroup="extend horizontal">
+    <div focusgroup="extend inline">
       <div id=item2 tabindex=-1>
         <div focusgroup=extend>
           <span id=item3 tabindex=-1>item3</span>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis.html
index 960b8604b0d29..b4ff4fab5648e 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to previous item, skipping the focusgroup that extends in the orthogonal axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -13,7 +13,7 @@
 <div focusgroup=wrap>
   <span id=item1 tabindex=0>item1</span>
   <div>
-    <div focusgroup="extending horizontal">
+    <div focusgroup="extend inline">
       <span id=item2 tabindex=-1>item2</span>
       <span id=item3 tabindex=-1>item3</span>
     </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/wraps-in-axis.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/wraps-in-axis.html
index fdccee9742f41..afded47311726 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/wraps-in-axis.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/backward-navigation/vertical/wraps-in-axis.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus wraps in the arrow key pressed axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div focusgroup="vertical wrap">
+<div focusgroup="block wrap">
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
   <span id=item3 tabindex=-1>item3</span>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/descends-in-horizontal-inner-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/descends-in-horizontal-inner-focusgroup.html
index 3d0d7f0fa5d31..f46d07f41d57e 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/descends-in-horizontal-inner-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/descends-in-horizontal-inner-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus descends from vertical focusgroup into horizontal focusgroup.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,9 +10,9 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=fg1 focusgroup=vertical>
+<div id=fg1 focusgroup=block>
   <span id=item1 tabindex=0>item1</span>
-  <div id=fg2 tabindex=-1 focusgroup="extend horizontal">
+  <div id=fg2 tabindex=-1 focusgroup="extend inline">
     <span id=item2 tabindex=-1>item2</span>
   </div>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/does-not-move-when-axis-not-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/does-not-move-when-axis-not-supported.html
index ebf7238c543ba..dd2442f4a6b85 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/does-not-move-when-axis-not-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/does-not-move-when-axis-not-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus does not move to next focusgroup item when the axis of the arrow key pressed isn't supported.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup=vertical>
+<div id=root focusgroup=block>
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/does-not-wrap-even-when-other-axis-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/does-not-wrap-even-when-other-axis-supported.html
index 19535e1df9229..a9e8deeba01ee 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/does-not-wrap-even-when-other-axis-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/does-not-wrap-even-when-other-axis-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Does not wrap when the arrow keypress is supported but the focusgroup only wraps in the other axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup="vertical wrap">
+<div id=root focusgroup="block wrap">
   <span id=item1 tabindex=0>item1</span>
   <div id=item2 tabindex=-1 focusgroup=extend>
     <!--This focusgroup supports both axes, but only wraps in the vertical one.-->
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/moves-when-only-current-axis-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/moves-when-only-current-axis-supported.html
index 9ae9892c1dabb..3757c831a79ca 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/moves-when-only-current-axis-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/moves-when-only-current-axis-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to next focusgroup item when only the axis of the arrow key pressed is supported.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup=horizontal>
+<div id=root focusgroup=inline>
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis.html
index 05f8268895892..ef3611e7237e1 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/skips-focusgroup-that-extends-in-orthogonal-axis.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to next item, skipping the focusgroup that extends in the orthogonal axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -11,7 +11,7 @@
 <script src="../../resources/focusgroup-utils.js"></script>
 
 <div id=root focusgroup>
-  <div id=item1 tabindex=0 focusgroup="extend vertical">
+  <div id=item1 tabindex=0 focusgroup="extend block">
     <span id=item2 tabindex=-1>item2</span>
   </div>
   <span id=item3 tabindex=-1>item3</span>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-and-skips-orthogonal-inner-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-and-skips-orthogonal-inner-focusgroup.html
index af79ca24c6289..c17253a8623ff 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-and-skips-orthogonal-inner-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-and-skips-orthogonal-inner-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus wraps and skips the orthogonal inner focusgroup.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -11,7 +11,7 @@
 <script src="../../resources/focusgroup-utils.js"></script>
 
 <div id=root focusgroup=wrap>
-  <div focusgroup="extend vertical">
+  <div focusgroup="extend block">
     <span id=item1 tabindex=-1>item1</span>
     <span id=item2 tabindex=-1>item2</span>
   </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-in-appropriate-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-in-appropriate-focusgroup.html
index 80290c991856c..3ff2a1f5335de 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-in-appropriate-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-in-appropriate-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus wraps in the appropriate focusgroup.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,12 +10,12 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div focusgroup=wrap> <!--Supports horizontal wrapping-->
-  <div focusgroup="extend vertical"> <!--Doesn't support horizontal wrapping-->
+<div focusgroup=wrap> <!--Supports inline wrapping-->
+  <div focusgroup="extend block"> <!--Doesn't support inline wrapping-->
     <span id=item1 tabindex=0>item1</span>
     <div id=item2 tabindex=-1 focusgroup="extend wrap">
       <!--Supports wrapping in both axis, but only extend the
-          wrapping behavior of its ancestors in the vertical axis. -->
+          wrapping behavior of its ancestors in the block axis. -->
       <span id=item3 tabindex=-1>item3</span>
       <span id=item4 tabindex=-1>item4</span>
     </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-in-inner-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-in-inner-focusgroup.html
index ab33842340b35..8a8a4c8c22bf5 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-in-inner-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/horizontal/wraps-in-inner-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus wraps in the inner focusgroup only since the outer focusgroup only wraps in the other axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,11 +10,11 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup="vertical wrap">
+<div id=root focusgroup="block wrap">
   <span id=item1 tabindex=0>item1</span>
   <div id=item2 tabindex=-1 focusgroup="extend wrap">
     <!--This focusgroup supports wrapping in both axis, but only extend the wrapping
-        behavior of its parent in the vertical axis. -->
+        behavior of its parent in the block axis. -->
     <span id=item3 tabindex=-1>item3</span>
     <span id=item4 tabindex=-1>item4</span>
   </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/descends-in-vertical-inner-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/descends-in-vertical-inner-focusgroup.html
index 4f6f8e945973c..9c1e68b5a383c 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/descends-in-vertical-inner-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/descends-in-vertical-inner-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus descends from horizontal focusgroup into vertical focusgroup.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,9 +10,9 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=fg1 focusgroup=horizontal>
+<div id=fg1 focusgroup=inline>
   <span id=item1 tabindex=0>item1</span>
-  <div id=fg2 tabindex=-1 focusgroup="extend vertical">
+  <div id=fg2 tabindex=-1 focusgroup="extend block">
     <span id=item2 tabindex=-1>item2</span>
   </div>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/does-not-move-when-axis-not-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/does-not-move-when-axis-not-supported.html
index 794f079418d48..bd20319a8c3a5 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/does-not-move-when-axis-not-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/does-not-move-when-axis-not-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus does not move to next focusgroup item when the axis of the arrow key pressed isn't supported.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup=horizontal>
+<div id=root focusgroup=inline>
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/does-not-wrap-even-when-other-axis-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/does-not-wrap-even-when-other-axis-supported.html
index f7b697e5c0242..0b2028548a999 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/does-not-wrap-even-when-other-axis-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/does-not-wrap-even-when-other-axis-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Does not wrap when the arrow keypress is supported but the focusgroup only wraps in the other axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,10 +10,10 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup="horizontal wrap">
+<div id=root focusgroup="inline wrap">
   <span id=item1 tabindex=0>item1</span>
   <div id=item2 tabindex=-1 focusgroup=extend>
-    <!--This focusgroup supports both axes, but only wraps in the horizontal one.-->
+    <!--This focusgroup supports both axes, but only wraps in the inline one.-->
     <span id=item3 tabindex=-1>item3</span>
     <span id=item4 tabindex=-1>item4</span>
   </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/moves-when-only-current-axis-supported.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/moves-when-only-current-axis-supported.html
index b5b97cca674a4..d5eb894de3fe3 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/moves-when-only-current-axis-supported.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/moves-when-only-current-axis-supported.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to next focusgroup item when only the axis of the arrow key pressed is supported.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,7 +10,7 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup=vertical>
+<div id=root focusgroup=block>
   <span id=item1 tabindex=0>item1</span>
   <span id=item2 tabindex=-1>item2</span>
 </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis.html
index 4fe753126bff3..419ee8dc47c9d 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/skips-focusgroup-that-extends-in-orthogonal-axis.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus moves to next item, skipping the focusgroup that extends in the orthogonal axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -11,7 +11,7 @@
 <script src="../../resources/focusgroup-utils.js"></script>
 
 <div id=root focusgroup>
-  <div id=item1 tabindex=0 focusgroup="extend horizontal">
+  <div id=item1 tabindex=0 focusgroup="extend inline">
     <span id=item2 tabindex=-1>item2</span>
   </div>
   <span id=item3 tabindex=-1>item3</span>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-and-skips-orthogonal-inner-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-and-skips-orthogonal-inner-focusgroup.html
index 64a4b76ebf860..d4623401e0075 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-and-skips-orthogonal-inner-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-and-skips-orthogonal-inner-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus wraps and skips the orthogonal inner focusgroup.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -11,7 +11,7 @@
 <script src="../../resources/focusgroup-utils.js"></script>
 
 <div id=root focusgroup=wrap>
-  <div focusgroup="extend horizontal">
+  <div focusgroup="extend inline">
     <span id=item1 tabindex=-1>item1</span>
     <span id=item2 tabindex=-1>item2</span>
   </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-in-appropriate-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-in-appropriate-focusgroup.html
index fa9c72b0bdf46..c387cc22f4a61 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-in-appropriate-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-in-appropriate-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus wraps in the appropriate focusgroup.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,12 +10,12 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div focusgroup=wrap> <!--Supports vertical wrapping-->
-  <div focusgroup="extend horizontal"> <!--Doesn't support vertical wrapping-->
+<div focusgroup=wrap> <!--Supports block wrapping-->
+  <div focusgroup="extend inline"> <!--Doesn't support block wrapping-->
     <span id=item1 tabindex=0>item1</span>
     <div id=item2 tabindex=-1 focusgroup="extend wrap">
       <!--Supports wrapping in both axis, but only extend the
-          wrapping behavior of its ancestors in the horizontal axis. -->
+          wrapping behavior of its ancestors in the inline axis. -->
       <span id=item3 tabindex=-1>item3</span>
       <span id=item4 tabindex=-1>item4</span>
     </div>
diff --git a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-in-inner-focusgroup.html b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-in-inner-focusgroup.html
index 8fd44ba0f1d6e..d34b71c32b23b 100644
--- a/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-in-inner-focusgroup.html
+++ b/third_party/blink/web_tests/external/wpt/html/interaction/focus/focusgroup/tentative/forward-navigation/vertical/wraps-in-inner-focusgroup.html
@@ -2,7 +2,7 @@
 <meta charset="utf-8">
 <title>HTML Test: focusgroup - Focus wraps in the inner focusgroup only since the outer focusgroup only wraps in the other axis.</title>
 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
-<link rel="help" href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Focusgroup/explainer.md">
+<link rel="help" href="https://open-ui.org/components/focusgroup.explainer/">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="/resources/testdriver.js"></script>
@@ -10,11 +10,11 @@
 <script src="/resources/testdriver-actions.js"></script>
 <script src="../../resources/focusgroup-utils.js"></script>
 
-<div id=root focusgroup="horizontal wrap">
+<div id=root focusgroup="inline wrap">
   <span id=item1 tabindex=0>item1</span>
   <div id=item2 tabindex=-1 focusgroup="extend wrap">
     <!--This focusgroup supports wrapping in both axis, but only extend the wrapping
-        behavior of its parent in the horizontal axis. -->
+        behavior of its parent in the inline axis. -->
     <span id=item3 tabindex=-1>item3</span>
     <span id=item4 tabindex=-1>item4</span>
   </div>