such bugs are often caused by extension. you seem to have quite a few
enabled, so i am closing this based on the assumption its caused by one
of those. Please disable all in tools -> addons until you find the
problematic extensions. if you have all disabled and still see this,
please reopen the bug
** Attachment added: "Dependencies.txt"
http://launchpadlibrarian.net/33273019/Dependencies.txt
** Attachment added: "ExtensionSummary.txt"
http://launchpadlibrarian.net/33273020/ExtensionSummary.txt
** Attachment added: "profiles.ini.txt"
http://launchpadlibrarian.net/33273021/profiles
