## The problem
Issue SeleniumHQ/selenium#11736 (closed, 48 comments): ### Feature and motivation Firefox's implementation of ChromeDevTools protocol (CDP) is half-baked and not complete. This leads to errors when trying to use certain CDP APIs and tends to cause CI failures. Firefox is focused on implementing the W3C-compliant BiDi protocol. https://wpt.fyi/results/webdriver/tests/bidi?label=experimental&label=master&aligned&view=subtest is a good way to track the progress.

## The fix
[pujagani (contributor)]: CDP support for Firefox was removed in Selenium 4.29.0. Upgrade to 4.29.0 or newer; the release notes cover the change.

## Notes
Thread: https://github.com/SeleniumHQ/selenium/issues/11736. Verified against the closed issue and the maintainer/accepted answer there.