I'm seeing something similar every time firefox window gets focused. As long as it keeps the focus, all is fine. Is it the same for you? I noticed removing all bookmarks avoided this problem.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/931004 Title: Frequent multi-second UI freezes with 11.0~b1+build1-0 Status in “firefox” package in Ubuntu: New Bug description: Since the upgrade to firefox=11.0~b1+build1-0, there have been repeated multi-second UI freezes/hangs in Firefox. This can last anywhere from 5 seconds to 30 seconds, during which Firefox does not respond to mouse or keyboard input. Ideally the application should respond to user input within the HIG limit of 100 milliseconds. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/931004/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
