Join the Mozilla’s Test Days event from 9–15 Jan to test the new Firefox address bar on Firefox Beta 135 and get a chance to win Mozilla swag vouchers! 🎁

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

lost all tabs upgrading from ver 9 to 10

  • 2 replies
  • 2 have this problem
  • 5 views
  • Last reply by po90260

more options

Upgrade from ver 9 to 10 lost all of my tabs! They are in sessionstore.bak but renaming it sessionstore.js doesn't restore them.

Upgrade from ver 9 to 10 lost all of my tabs! They are in sessionstore.bak but renaming it sessionstore.js doesn't restore them.

All Replies (2)

more options

Anything in restore Recently Closed Tabs/Windows?

more options

Recently Closed Tabs/Windows is grey.