Try running a new profile. Instuctions can be found https://wiki.ubuntu.com/MozillaTeam/Bugs Recently, users have been complaining about Forecast Fox being a memory hog.
-- firefox using over 90% of CPU https://launchpad.net/bugs/78786 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
