1749912 - Ubuntu 20.04.1 LTS, Mozilla Firefox 96.0: Firefox becomes unresponsive on opening new tabs occasionally. Cannot start new Firefox session until process name GeckoMain is killed.

Status: VERIFIED DUPLICATE of bug 1749910

(Core :: Networking, defect)

Description

[yde773786]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0

Steps to reproduce:

Open new tabs

Actual results:

Unresponsive, resembles scenario where internet is not found

Expected results:

opened tab normally

Comment 1

[jeroen.roovers]

I experience the same problem on Windows with 96.0.

Appears like loss of internet like yde773786 mentioned, as in(trying to new tabs don't 'freeze' per se, but show loading indicator indefnitely or until proces is killed. PC fan also ramps up indicating high CPU usage during unresponsiveness.

I have not found a way to consistently reproduce the issue but it has happened twice in 30 minutes of using 96.0.

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox::Tabbed Browser' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 3

[Daniel]

I have the same issue on macOS Catalina 10.15.7. Since i updated Firefox to version 96.0 I can not browse the internet anymore. All websites are "loading infinity" and the spinner is spinning.

Firefox can also not check for updates anymore, this is also just loading forever. Firefox starts to eat 100% CPU and the only way to close Firefox is by killing it.

Firefox 97.0b2 Developer Edition is working fine, and is my workaround for now.

Comment 4

[Gaetano Giunta]

Same here. Win10 21H1 64bit, build 19044.1466.

I updated FF yesterday to 96.0, and at some point this morning, without any specific action or event which I can think of as relating, it got into this "stuck" mode where new tabs just spin forever as if waiting for the network, and trying to shut down the app results in stuck processes which have to be killed manually.

I tried a few things, such as increasing free RAM and reducing CPU usage by other apps, as well as starting FF with a clean profile or in Troubleshoot Mode, but it does not seem to make any difference.

Needless to say this is quite aggravating, as it makes FF unusable, and that's where I keep all my bookmarks and passwords. I think I could revert to FF 95, but the instructions page for doing so tries hard to discourage users from attempting to do so - it even mentions not not being able to downgrade a profile any more to a previous version for "safety reasons", which is kinda backwards, as what is a user supposed to do if the latest version is badly bugged?