Start '''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Firefox in Safe Mode]''' {web Link} by holding down the '''<Shift><br> ''(Mac=Options)'' ''' key, and then starting Firefox. Is the problem still there? While still in Safe Mode, In the address bar, type '''about:crashes'''<enter>.''' Note:''' If any reports do not have '''BP''' in front of the numbers/letters, click it to Submit them. '''The crash report is several pages of data.''' '''We need the report numbers to see the whole report.''' Using your mouse, '''mark''' the most '''resent 7 - 10''' crash reports, and '''copy''' them. Now go to the reply box below and '''paste''' them in. ;[[Image:aboutcrashesFx29|width=500]] ----------------- If you can't get Firefox to open, you will have to do this the hard way. '''https://support.mozilla.org/en-US/kb/mozillacrashreporter''' Open the file browser / explorer on your computer. '''Note:''' You may have to enable '''Show Hidden Folders / Files.''' Enter this in the address bar; '''Windows:''' %APPDATA%\Mozilla\Firefox\Crash Reports\submitted '''Win 7/Vista:''' C:\Users\'''<username>'''\AppData\Roaming\Mozilla\Firefox\Crash Reports\submitted '''Win XP/2000:''' C:\Documents and Settings\'''<username>'''\Application Data\Mozilla\Firefox\Crash Reports\submitted '''Mac OS:''' /Users/'''<username>'''/Library/Application Support/Firefox/Crash Reports/submitted '''Linux:''' /home/'''<username>'''/.mozilla/firefox/Crash Reports/submitted Copy the last '''5-7 Recent File Names''' in the folder. Post the information in the reply box below.

What Firefox version are you using? Does this also happen with multi-process tabs disabled? Did you enable this feature yourself because this isn't enabled in current releases? *browser.tabs.remote.autostart See also: *https://wiki.mozilla.org/Electrolysis *https://developer.mozilla.org/Firefox/Multiprocess_Firefox