Firefox crashes when opening

did you use Firebug? your crash mostly related to Firebug, if you have Firebug try to restart your browser with Firebug disable -------- 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.org/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.org/kb/Firefox+crashes * https://support.mozilla.org/en-US/kb/latest-firefox-issues