Firefox isn't starting

[dudelll]

"Close Firefox" msg appears saying it is already running but not responding. Reproducible after reboot. Chromium / Brave start normally. Independent of Wired / Wireless. Process status is sleeping, second process starting with running, but switches to sleeping after the error msg appears. Not responding msg at restart.

Installed on mini PC BMAX 1 Plus with added wireless driver.

Attached

• system info
• sw list
• various screenshots
• Firefox.tar.gz

[dudelll]

After a couple of restarts and ending / killing of the firefox-bin process in the System Monitor, Firefox is now starting and running with 2 or 3 instances instead of 1 or 2 as before.

[anaximeno]

I had this same issue after upgrading Firefox to the last version, to solve this I had to kill that firefox-bin process that was running in the background and open Firefox from the terminal using:

firefox --browser

After that it would always open without any problem, as usual. This happened while I was using 21.1 so I am not sure if it is a regression, but if more people had this problem it might be good to reallocate this issue to a more appropriate repository.

[dudelll]

On my second install it didn't happen again; but the difference was that I used a shared home folder / partition of the previously installed Debian 12 (Firefox ESR).

[mtwebster]

I have this happen every so often (maybe 3 times in the past year), but it's not isolated to Mint as far as I can see if I do a search.

It seems to involve Firefox not exiting cleanly and removing its profile locks - https://unix.stackexchange.com/questions/67166/why-does-firefox-refuse-to-die-despite-killing-it-with-pkill-9

I'm not saying this is the specific reason for you, but just that this isn't really an isolated thing.