I have found 3 more bug reports which look like they may be referring to the same issue: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1081485 https://bugs.launchpad.net/unity/+bug/968533 https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1132234
** Tags added: running-unity ** Tags added: trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1610608 Title: Browser slowdown: cause: global menu integration with many bookmarks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1610608/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs