Migrate Firefox to use WebDriver BiDi

[jennifer-shehane]

What would you like?

Firefox will be removing support for CDP at the end of 2024. See announcement. Cypress will need to move all CDP over to WebDriver BiDi.

We'll be able to defer the effects of the deprecation in Firefox 129 - See Issue

Notably in the announcement:

The removal of CDP has no impact on Marionette, geckodriver and WebDriver BiDi. All these protocols will be maintained and further development happens to extend their feature sets.

Why is this needed?

No response

Other

This is a large issue so the work is being broken up into several smaller issues:

• misc: Remove Firefox marionette-client in favor of Geckodriver #30217
• chore: update docker-image in Cypress CI to test against Chrome latest (128) and Firefox latest (130) #30218
• misc: Implement Universal WebDriver BiDi client #30219
• misc: Connect WebDriver BiDi client to Firefox inside Cypress to replace CDP / Classic WebDriver #30220
• misc: Replace @packages/extension methods that are now implemented by WebDriver BiDi when BiDi is enabled #30221
• breaking: remove log:memory:pressure and firefox:force:gc from the socket API #30222

[whimboo]

Hello @AtofStryker. I wonder if this issue could be marked as done now given that CDP support is gone for Firefox.

[jennifer-shehane]

@whimboo Our migration is not fully complete. CDP support in Firefox will be removed in Firefox 141 officially, so we'll complete the migration before then.

[whimboo]

Oh, would you be ok with sharing what's left to do? I assume it's only work on Cypress internals and not related to the BiDi protocol then?

[AtofStryker]

Hey @whimboo. The only thing that is really left is migrating parts of the extension over to BiDi which I have a draft for here. The issue for this is #30221. It's only related to Cypress internals to use the BiDi methods in place. We only need to keep the web extension around for a handful of methods which we talked about in the State of Automation spreadsheet and outlined in issue #30447. Though getting the extension cut over should allow us to close out our BiDi epic 🎉