Firefox freezing after upgrade to 146.0

[MPV]

After sleeping or locking screen, I find the Firefox browser is freezed, unsensitive to any action. This is happening systematically after upgrading to version 146.0. It had never happened to me before that upgrade. Any suggestions? Thanks!

[siffemcon]

Does that also happen in Troubleshoot mode (https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode/)?

[JulesA]

I have the same issue. Terrible browser now. Makes no difference if its in troubleshoot mode or not. They're ruining Firefox with each update... 

[MPV]

Yes, it happens also in Troubleshoot mode

[JulesA]

Yes, it's REALLY, REALLY BAD. The browser is almost not useable anymore. Constantly freezes up, freezes when you try to type into fields, YouTube is very difficult to use with the update. It's a terrible browser. The worse changes were about a year ago which made me use an older browser, but now its beyond bad. 

[forrie]

I have been experiencing similar issues, on MacOS Sequoia, and it's really interfering with my regular use of the browser.  

I have brought the browser into Safe Mode and felt the same issues were present.   The information available in about:processes could be better.  For example, under Extensions, I'd like to see a breakdown of which extension is active and what % resources it's consuming.    Each time I run this, however, the only process that is really high is Firefox itself.

Yes, I do have several tabs open.  But, when this happens, I will kill off the Firefox process, restart/restore, and even with inactive tabs, the problem persists.    

I do use uBlockOrigin and I suspected this may be part of the issue, but I cannot confirm it.  At least, not with the debugging I've been able to do.

This problem seemed to present in the recent builds, as I've not really added much to it.

I take the same URLs and insert them into another browser and it works fine, granted in at least Chrome, I cannot run a full uBlockOrigin due to their recent changes, so I can't fully duplicate.

I "could" downgrade the version of Firefox, but that would take bit of effort (I have a lot of bookmarks, etc) and I don't really want to lose my active session cookies.

That being said, do we understand what the specific issues are or may be, and what additional steps might be useful to help debug?  A search shows there are various similar reports, but I cannot substantiate them.

[zaufi]

Also faced with freezes 😞 146 and 146.0.1 affected.

It just become irresponsible after some short time after start.

[forrie]

I have observed the processes on MacOS, via Activity Monitor.  When I see FirefoxCP Webextensions using 30% or more CPU, Firefox itself begins to climb -- I've seen it use more than 100%.  

If I go to about:processes, I cannot see a way to drill down into individual web extensions, to identify any problems therein.   Is there some way to do this with Firefox?

[Agentvirtuel]

Hello

https://support.mozilla.org/en-US/kb/file-bug-report-or-feature-request-mozilla
If you wish, you can send your comment, file a bug report.

Components Firefox.
https://bugzilla.mozilla.org/describecomponents.cgi?product=Firefox

Task Manager - see whether tabs or extensions are slowing down Firefox.
https://support.mozilla.org/en-US/kb/task-manager-tabs-or-extensions-are-slowing-firefox
Firefox Profiler https://profiler.firefox.com/docs/#/./guide-getting-started
For information purposes, with your report, you can share a profile.
https://firefox-source-docs.mozilla.org/performance/reporting_a_performance_problem.html

At the instant of your observation.

[Vincent]

If this is happening on MacOS and you have an external monitor, you are likely running into this bug, that is on track for being fixed in the next release: https://bugzilla.mozilla.org/show_bug.cgi?id=1985140

[MPV]

I am using an external monitor on MacOS. Thanks for your reply, I hope this is indeed fixed soon.

[vvz3n]

Same behaviour here too on Linux 6.17.9-76061709. Running Firefox 146.0 on Pop!OS (Cosmic DE) on the main monitor of my workstation. The previous version was definitely not as crashy. I'd love to give more help for troubleshooting because this latest update has basically made Firefox unusable: it constantly crashes and it's almost always unresponsive after I log out and in again, forcing me to close it (and then even the crash handler seems to hang for a while, which forces me to `kill` it)