This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

I just updated to 4.0.1 and I get the "We're sorry. Firefox had a problem and crashed. We will try to open your tabs/windows when Firefox restarts" However, it just keeps popping back up, firefox never restarts!!!

  • 1 ŋuɖoɖo
  • 62 masɔmasɔ sia le wosi
  • 1 view
  • Nuɖoɖo mlɔetɔ cor-el

more options

This morning I had a popup on my Windows XP PC stating that the 4.0.1 update was available. I upgraded. now, i receive the following error: We're sorry. Firefox had a problem and crashed. We will try to open your tabs/windows when Firefox restarts. You can submit crash report data, blah blah blah (which i have submitted several)

But, firefox DOES NOT ever open. It just pops back up with that same report window, over and over.

This morning I had a popup on my Windows XP PC stating that the 4.0.1 update was available. I upgraded. now, i receive the following error: We're sorry. Firefox had a problem and crashed. We will try to open your tabs/windows when Firefox restarts. You can submit crash report data, blah blah blah (which i have submitted several) But, firefox DOES NOT ever open. It just pops back up with that same report window, over and over.

All Replies (1)

more options

It is possible that there is a problem with the files sessionstore.js and sessionstore.bak in the Profile Folder

Delete sessionstore.js and sessionstore.bak in the Profile Folder

  • Help > Troubleshooting Information > Profile Directory: Open Containing Folder

If you see files sessionstore-##.js with a number in the left part of the name like sessionstore-1.js then delete those as well.

Deleting sessionstore.js will cause App Tabs and Tab Groups to get lost, so you will have to create them again (make a note).

See: