1600054 - (remote-fission) [meta] Make partial CDP implementation Fission compatible

Status: RESOLVED WONTFIX

(Remote Protocol :: CDP, task)

Description

[Henrik Skupin [:whimboo][⌚️UTC+1]]

This bug will track the work that needs to be done to make the Remote Agent Fission compatible.

Comment 1

[Chris Peterson [:cpeterson]]

Tracking for Fission Nightly (M6)

Comment 2

[Chris Peterson [:cpeterson]]

Tracking for Fission M6b Nightly milestone.

Comment 3

[Chris Peterson [:cpeterson]]

Moving Remote Protocol bugs to Fission Beta milestone (M7).

Comment 4

[Chris Peterson [:cpeterson]]

DevTools meta bugs don't need to block Fission MVP. However, we will continue to monitor these meta bugs for any new bugs blocking them as potential blockers for Fission MVP.

Comment 5

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Nowadays it's not the Remote Agent that isn't Fission compatible but the CDP implementation. Maybe we can re-use the message handler architecture as implemented for WebDriver BiDi to also make CDP Fission compatible.

Comment 6

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Now with bug 1601245 fixed we have basic Fission support, which includes that BFCacheInParent is disabled and all web pages are forced to a single shared content process. For now we are not planning further work, unless one of the prefs to control both states is going to be removed.

Comment 7

[Henrik Skupin [:whimboo][⌚️UTC+1]]

The changes in bug 1819965 helped a bit here given that we will no longer hang for certain commands if the underlying browsing context / message manager gets replaced. Nevertheless we still have a lot of state that we hold on the child process and that is not going to work well with Fission. As such our implementation still suffers proper support and we requested the Selenium project to deprecate its usage in favor of WebDriver BiDi.

Comment 8

[Henrik Skupin [:whimboo][⌚️UTC+1]]

The required work for this bug is too much and seeing WebDriver BiDi coming along nicely we are not going to refactor the CDP code base for complete Fission compatibility.