I have Ubuntu 12.10 and it most of times crashes. I've disabled all plugins, resetted firefox, started in safe-mode, but still crashes. It even crashes in safe-mode after firefox reset.
I also did firefox purge via apt-get and re-installed it after cleaning apt-cache (re-download), still crashes...
Sometimes crashes becomes constant, I mean, it crashes right after I click on firefox icon, then I press quit, re-click on firefox icon ONLY, crash!, re-click crash! etc.
I checked /var/log/syslog and dmesg, can't find anything related to firefox or mozilla.