''locking this thread as duplicate, please continue at [https://support.mozilla.org/questions/1052684 /questions/1052684]'' before few days firefox working fine. but now firefox not working in windows 8. I update the firefox but any website could not load. I check all the support from firefox but could not help to solve out my problem. in other browser all sites are working fine. when i close the firefox and re-open it shows me error message that firefox is already running close firefox or cancel. when i close firefox and again start it shows me message that profile is missing. when i delete old profile and make new profile than also same problem occur. i uninstall firefox and re install but could not solve the problem. please help me..