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We recently learned that JAWS 2024 and older do not work properly when the UIA provider is enabled in Chromium. This is a JAWS issue, that they resolved in older versions for Microsoft Edge (which supports the UIA provider by default) and for Google Chrome as of JAWS 2025. In order to rollout UIA to all Chrome users without creating issues for the JAWS users, we are building this mechanism that detects when an older version of JAWS is running and disables the UIA provider for those users. Disabling the UIA provider is two folds: 1. Set the UIA enablement to `kDisabled`, as it's done by the flag. 2. Notify UIA that the previous UIA providers we exposes aren't valid anymore. To do so, we use the UiaDisconnectAllProviders function [1]. Because of an issue with JAWS in local Chromium builds (just doesn't work in text fields, irrespective of whether UIA is enabled or not, with and without this change), we couldn't test the complete solution in the local build and are moving to test this out in Chrome Canary, where JAWS does work in text fields when the UIA provider is disabled. However, we tested all individual parts (getting the JAWS version, disabling UIA after a provider was shared with a client if JAWS 2024 or lower is running, etc.) successfully. If this change does not fix the JAWS issue, we intend to revert this change. Furthermore, this change is gated behind a kill switch, allowing us to disable it remotely if unexpected issues arise with JAWS or other assistive technologies. [1]: https://learn.microsoft.com/en-us/windows/win32/api/uiautomationcoreapi/nf-uiautomationcoreapi-uiadisconnectallproviders Bug: 406006402 Change-Id: Ia2bd65c2c2268c99f20cb7b323c1f842b1fdc009 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6423354 Commit-Queue: Benjamin Beaudry <benjamin.beaudry@microsoft.com> Reviewed-by: Greg Thompson <grt@chromium.org> Reviewed-by: Aaron Leventhal <aleventhal@chromium.org> Reviewed-by: Dave Tapuska <dtapuska@chromium.org> Cr-Commit-Position: refs/heads/main@{#1442877}
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Chromium
Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all users to experience the web.
The project's web site is https://www.chromium.org.
To check out the source code locally, don't use git clone! Instead,
follow the instructions on how to get the code.
Documentation in the source is rooted in docs/README.md.
Learn how to Get Around the Chromium Source Code Directory Structure.
For historical reasons, there are some small top level directories. Now the guidance is that new top level directories are for product (e.g. Chrome, Android WebView, Ash). Even if these products have multiple executables, the code should be in subdirectories of the product.
If you found a bug, please file it at https://crbug.com/new.