1427415 - Firefox on Linux intermittently hangs forever on visiting Facebook

Status: RESOLVED WORKSFORME

(Core :: General, defect)

Description

[[:jberkus] Josh Berkus]

Fedora 26/Wayland/Gnome
Firefox 55.0.3
Main Extensions: PrivacyBadger, TabMixPlus, Flash

For the last 4 months, I've been having issues with Firefox hanging in a peculiar way *sometimes* when I visit Facebook.  Let me explain what happens so you'll see why it's peculiar:

1. I have several tabs open for several sites.
2. I visit Facebook and use it.  
3. Sometimes this happens immediately on initial Facebook home page load, sometimes after several hours, and everything in between ... I strongly suspect that it's ad-related.
4. Suddenly Facebook stops loading.
5. Firefox seems to be operating.  I can click on tabs, switch windows, and scroll around already loaded content.
6. However, I cannot load any new content.  Firefox behaves as if my internet connection was down (it's not, and sites in Chrome load normally).
7. I close firefox.  
8. The program does not shut down, but remains running in the background.  For this reason, it can't be resarted.
9. Eventually I have to "kill" firefox on the command line.

Since this issue sometimes happens several times in one day, and other times not for several days, I haven't been able to either use FF in safe mode, or keep the debug log running long enough for the problem to recur.  However, today finally I got an actual crash report out of one of these hangs, so I'm reporting the issue now:

https://crash-stats.mozilla.com/report/index/85ac317b-9c68-445a-ba3c-8da5d0171230

Hopefully that crash report provides some insight.  If not, I'll go back to hoping that this gets fixed in 57 or 58 as a side effect of something else.  Thanks!

Comment 1

[[:jberkus] Josh Berkus]

Additional notes: Flash is set to "ask to load" and the longest I've waited for FF to shut down before killing it was 30 minutes.

Comment 2

[Panos Astithas (he/him) [:past] (please ni?)]

The crash report isn't very helpful, sadly. It is a shutdown hang that is normally caused when the content process takes a while to quit. I wonder why the stack is missing though. Is this a distro/custom build?

Comment 3

[Daniel Holbert [:dholbert]]

( --> Marking [qf-] since hangs/lockups aren't really in-scope for qf. Definitely sounds like a bug; just not in the umbrella of qf, since qf can't include everything.)

Comment 4

[[:jberkus] Josh Berkus]

Closing this, the hangs are no longer happening.