Create a new profile as a test to check if your current profile is causing the problems. See "Basic Troubleshooting: Make a new profile": * https://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems. If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files. See: * http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox See: * http://kb.mozillazine.org/Firefox_crashes * https://support.mozilla.com/kb/Firefox+crashes

That is a problem with Roboform. You can try to update to Roboform 7.6.2 *[https://bugzilla.mozilla.org/show_bug.cgi?id=691271 bug 691271] RESOLVED WORKSFORME Crash mainly close to startup in [@ DebugBreak ] [@ DbgBreakPoint ] with Roboform