Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

Can I restore my previous browser session with the "previous" file in "sessionstore-backups"?

  • 1 reply
  • 1 has this problem
  • 10 views
  • Last reply by cor-el

more options

I opened my browser like usual, but a program interfered before I clicked on "Restore previous session" and closed the browser. When I opened my browser again, the option to restore the session was gone. I read in other posts that you could restore these sessions by using "sessionstore.bak" or "upgrade.js-(datetime)" in the "sesstionstore-backups" folder. However the file that corresponds to the session I want to restore is called "previous". Is it possible to restore that file as a session, and if so, how can I do it? Thank you in advance.

I opened my browser like usual, but a program interfered before I clicked on "Restore previous session" and closed the browser. When I opened my browser again, the option to restore the session was gone. I read in other posts that you could restore these sessions by using "sessionstore.bak" or "upgrade.js-(datetime)" in the "sesstionstore-backups" folder. However the file that corresponds to the session I want to restore is called "previous". Is it possible to restore that file as a session, and if so, how can I do it? Thank you in advance.

Modified by user1194322

All Replies (1)

more options

Make sure to create a backup of all the files in the sessionstore-backups folder. You can copy the previous.js file to sessionstore.js in the main profile folder.


previous.js (cleanBackup: copy of sessionstore.js from previous session that was loaded successfully) recovery.js (latest version of the sessionstore written during runtime) recovery.bak (previous version of the sessionstore written during runtime) upgrade.js-<build_id> (backup created during an upgrade of Firefox)