We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

how do I fix this error? Your last firefox session closed unexpectedly. Firefox gives 2 option and neither start Firefox.

  • 1 reply
  • 12 have this problem
  • 1 view
  • Last reply by cor-el

more options

While using linux I am getting the following message - "Your last session closed unexpectedly. You can restore the tabs and windows from the previous session, or start a new session if you think the problem was related to a page you were viewing". When I select either "Start new session" or "Restore session" Firefox does not start and I have no access to the internet.

While using linux I am getting the following message - "Your last session closed unexpectedly. You can restore the tabs and windows from the previous session, or start a new session if you think the problem was related to a page you were viewing". When I select either "Start new session" or "Restore session" Firefox does not start and I have no access to the internet.

All Replies (1)

more options

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

See:

Make sure that you close Firefox properly.