How to get rid of a dead Firefox process?

[aragats]

It's not a zombie, but I cannot kill it.
Initially I quit Firefox, then tried to start it, it reported it's already running, after a while I was able to start it, however, that process remained in STOP state.
I tried killing it with no luck, then it was adopted by init after I killed its parent:

% ps xalp 6612
 UID  PID PPID CPU PRI NI     VSZ    RSS MWCHAN STAT TT       TIME COMMAND
1001 6612    1   0  20  0 1860164 606984 -      T     -  259:39.70 firefox

Thanks for ideas!

 

[obsigna]

In cases where a kill -KILL <PID> (issued by root) did not work, I refrained to restart. In the last 10 years this happened perhaps 2 or 3 times to me.

In case you can repeat this stage in a reliable way, it would be good to file a PR, because kill -KILL is supposed to work unconditionally.

 

[aragats]

I already tried killing with various signals including KILL, nothing helps.
Regarding the reproducing: it's a good idea, I'll try.

 

[aragats]

Yeap, it is reproducible! Now got 2 of them:

% ps alx | grep firefox
1001  6612     1   0  20  0 1860164  606956 -        T     -    259:39.70 firefox
1001  9293  9257   0  20  0 1532816  291084 -        T     -      0:06.66 firefox

I believe, it has a connection with PR 233679. Although people report it was "solved" after upgrading 63->64, I see the same errors when launching firefox from a terminal.

 

[Phishfry]

Have you tried pkill -f firefox ?

 

[aragats]

Have you tried pkill -f firefox ?

I have, I guess, eventually it sends one of the signals anyway. If kill -9 doesn't help, nothing will...

By the way, with a fresh Firefox profile I cannot reproduce that. However, it doesn't explain why it cannot be killed with my many-years-old profile.