I have exactly the same problem and reinstalling firefox did not help. It started when i upgraded from Karmic to Lucid. Symptoms: firefox hangs (not responding and colored bw by compiz) for about 30 seconds before any firefox dialog or popup opens. After about 30 seconds it works normally. While hanging no CPU or memory activity from firefox process at all.
I tried purging all firefox packages and plugins and removed .mozilla directory from my home directory, nothing helps :(( I have made an upgrade from Karmic to Lucid on several computers and only one have this problem. -- Firefox 3.6.3 Freezes After Clicking Any Menu or Bookmarks Toolbar Item in Ubuntu Lucid Lynx 10.04 https://bugs.launchpad.net/bugs/574617 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