Hello,
New update today, reboot, and no FF window when clicking on the icon. Still 4 processes in Task Manager. No error shown when running FF in Terminal. 
When killing the processes, something appeared :
When FF runs properly, the first process shows an icon. Something I did not see if no window appears :
But what about the first start of Firefox?
Kill all Firefox processes and run from terminal.
Kill FF processes, then run FF from Terminal : no error, but no window.
Kill FF processes, then run from icon : same
Kill FF processes, click on the link I used last time : same âŚ
Kill FF processes, click on another link : FF opens a window with all the tabs !!!
Cache problem ?
try
âright-clickâ firefox icon - âactionâ - ânew windowâ.
firefox comes up.
This worked for me.
I would rescue some file from .mozilla:
cert9.db=certificates
key4.db= has to do with passwords, I donât remember exactly, but worth backing up
logins.json = saved passwords
places.sqlite=bookmarks
prefs.js- self explanatory
search.json.mozlz4= Search engines, including custom
Then stop Firefox processes.
Now move .mozilla to .mozillabackup.
Start Firefox - this creates a new settings folder .mozilla.
Stop Firefox.
Copy the files mentioned above to .mozilla.
Start Firefox.
Try this to open a Firefox widow showing Troubleshooting Information page
firefox --new-window about:support
and click on Clear startup cacheâŚ
[answer to nikgnomic]
Done . After âRestartâ both FF windows reopened properly.
Close both windows, click on FF icon : both windows reopen again.
It seems to be corrected. I will see tomorrow after Reboot.
Thanks for your help and regards
Denis.
[Edit : next morning, Reboot, and FF started without problem ]
Hi Fafnir,
I will try this next time I have the problem (I saw your post after ikgnomicâs one). In that case, I will loose the tabs, but itâs usually not important.
Based on experience till today⌠Firefox processes lock each other out.
So first Task Manager icon is shown and mouse icon changes - indicating Firefox being run (loading), but then no GUI window is spawn and Firefox processes silently lock each other out without any error reported in console.
I kill the last processing identity spawned and like dominoes everything âunlocksâ and finishes initialization - thus spawning GUI window frames. At least that is now consistent behaviour even after multiple reboots.
But with this we are still in the same situation that we have to sometimes repeat this âkill-the-last-Firefox-processâ for Firefox to run. And relation to [2022-11-02] updates still unknown. I am reluctant to call this a solution, but at least we can use Firefox.
Try this to check Firefox running processes
firefox --new-window about:processes
Iâm having this exact same issue. It started a few weeks ago after the last big patch bundle release. To get Firefox working I have to click the icon, wait for it a few seconds and see if the browser window comes up. If it doesnât then I have to kill all the Firefox processes through terminal and try again. Usually it works on the second try but sometimes it wonât work until Firefox asks me if I want to start in safe mode. If I do that then it will work again until I reboot.
since safe-mode starts the browser with all add-ons disabled
it is essentially the same as temporarily creating a new profile
so:
removing your old profile and starting with a fresh one
is probably something you have tried?
mv ~/.mozilla ~/.mozilla.old
while there is no browser process running
If that (safe mode) helps, it is indicative of a problem with your add-ons or extensions.
I donât think itâs the extensions because I completely uninstalled Firefox and deleted the profiles folder and I still had the problem when I installed it again but before I installed any extensions.
Run pacman -Rsn Firefox to remove both Firefox along with all of itâs dependencies and configuration files. The files are not removed in the standard removal process.
These files are the cause of your problems because they remain behind after a removal, reinstall, or update.
The configuration files that you added after installation will have to be deleted manually.
While this seems a bit inconsistent - safe-mode and fresh profile works, but only sometimes - and I canât make heads or tails of it
this:
makes no sense and is not correct either
Itâs a bit like trying magic - hoping that doing something will achieve something, when it objectively canât.
When I proceed to remove firefox with:
sudo pacman -Rsn firefox
all that gets removed is ⌠firefox
nothing else
There are no configuration files to be left behind - except for the profile in ~/.mozilla
and perhaps the cache ~/.cache/mozilla
which will of course not be touched by removal of the program - nothing in the $HOME directory will be.
When I uninstalled Firefox I purposely made sure to delete the firefox folder under ~/.mozilla so everything would be removed, but the problem remains. The strange thing is that this is an intermittent problem. Sometimes it works on the first try (although thatâs rare), usually it works on the second try (after killing the first process), but sometimes it wonât work until Firefox prompts me about safe mode. Itâs weird!
Then the problem is in your installed system.
You may need to reinstall.
Can you post inxi -Fza ?
in my desperation, I have installed firefox-esr 102.5.0esr from mozilla in /opt (outside the box). Start from terminal and firefox runs.
The same im all my other user accounts.
Then I try it with firefox 107 ⌠the same issues before.
it seems to be a firefox problem.
As I added: