Your settings are not saved. try with new profile. Create a new profile as a test to check if your current profile is causing the problems. See '''Creating a profile''': *https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles *http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem '''Profile Backup and Restore''' *http://kb.mozillazine.org/Profile_backup *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles *http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Maybe something here will also help: *[[How to fix preferences that won't save]] and [[Reset Firefox preferences to troubleshoot and fix problems]] *[[Make Firefox your default browser]] *[[Change your default search settings in Firefox]] Not related to your question but the [https://support.mozilla.org/en-US/questions Mozilla Support Forums] are accessible to the public. Your email address is considered sensitive information when it's posted in a support forum thread (see [[Forum rules and guidelines]]). I'll remove your email address from this thread.