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.

Avatar for Username

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

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Firefox crashed and lost all my tabs

  • 1 baphendule
  • 1 inale nkinga
  • 17 views
  • Igcine ukuphendulwa ngu cor-el

dgminer
dgminer
more options

Windows 7, firefox 40.0.3

My computer crashed and thus, firefox did not close properly and lost all of my tabs. Under Menu -> History, the Restore Previous Session is greyed out. Why is this? Shouldn't I be able to restore from there?

I've found replies from "jscher2000" and my sessionstore-backups\previous.js file looks like the one I want to use to restore my tabs. However I do not see how to use this file to restore my tabs.

How do I use previous.js to restore my tabs and tab groups?

Windows 7, firefox 40.0.3 My computer crashed and thus, firefox did not close properly and lost all of my tabs. Under Menu -> History, the Restore Previous Session is greyed out. Why is this? Shouldn't I be able to restore from there? I've found replies from "jscher2000" and my sessionstore-backups\previous.js file looks like the one I want to use to restore my tabs. However I do not see how to use this file to restore my tabs. How do I use previous.js to restore my tabs and tab groups?

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You can backup the session files in the sessionstore-backups folder in the Firefox Profile Folder to make sure not to lose possible important session data. You can find these files in the sessionstore-backups 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)

You can copy a file from the sessionstore-backups folder to the main profile and rename the file to sessionstore.js to replace the current file (make a backup copy of the current sessionstore.js).

You can use this button to go to the current Firefox profile folder: