Safe mode didn't help solve the issue, BUT using a new profile (firefox -P) did.
Following http://kb.mozillazine.org/Standard_diagnostic_-_Firefox I went through the procedure to fix my profile: “Profile issues / To fix the problem in the original profile” I tried the suggestions in order, and removed several items from my profile directory, until the suggestion on the 4th line worked: removing the prefs.js made my Firefox stable again. This wiped my preferences but so far, my Firefox version hasn't crashed in hours. I must have changed a setting that caused this version of Firefox to crash. If I have the courage, I'll try to find out what one. So anyway, I hope this can help some of you. If needed, I can share the incriminating prefs.js file (after some sanitizing). -- Firefox hangs and has becoming very slow. It also crashes Firefox has become virtually unuasble https://bugs.launchpad.net/bugs/668867 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs