User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:184.108.40.206) Gecko/20090824 Firefox/3.5.3 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:220.127.116.11) Gecko/20090824 Firefox/3.5.3 I opened Mozilla, Reproducible: Sometimes
You are using a quite old version of Firefox. Please update it at least to Firefox 3.6.8. Test again if it is reproducible for you. We would need clear steps how to get into such a state. Once you have steps please also test in safe mode (http://support.mozilla.com/en-US/kb/Safe Mode) with all add-ons disabled.
No reply, INCOMPLETE. Please retest with Firefox 3.6.8 or later and a new profile (http://support.mozilla.com/kb/Managing+profiles). If you continue to see this issue with the newest firefox and a new profile, then please comment on this bug.