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

This thread was archived. Please ask a new question if you need help.

Convert sessionstore.js to sessionstore.jsonlz4

  • 1 reply
  • 2 have this problem
  • 18 views
  • Last reply by cor-el

eifucyert
eifucyert
more options

Firefox 56 crashed on me and when I restarted, Restore Previous Session was greyed out. I don't think I will be able to recover my previous session but I do have a sessionstore.js from a few days ago. Can I convert sessionstore.js to sessionstore.jsonlz4 to recover my older session tabs?

Firefox 56 crashed on me and when I restarted, Restore Previous Session was greyed out. I don't think I will be able to recover my previous session but I do have a sessionstore.js from a few days ago. Can I convert sessionstore.js to sessionstore.jsonlz4 to recover my older session tabs?

All Replies (1)

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

You need to remove an existing compressed sessionstore.jsonlz4 file and possibly rename the sessionstore-backups folder to make Firefox use the uncompressed sessionstore.js file. That should make Firefox fallback to sessionstore.js.

Make sure the startup setting is to automatically restore the session ("Show my windows and tabs from last time").

Modified by cor-el