How can I contact @jscher2000 active on the Mozilla Support (“SUMO”) forums?
suspected sessionstore.jsonlz4 corruption possible Sync rollback conflicts extremely large tab sessions spontaneous restoration of previously closed tabs during live browsing I am not a techy person. Have seen on Chat steps that can be taken, but it is too complicated for me. Seeking remote or other help. Would like to know how complex an issue this is. I'm having a very tough time. It just restored around 1,000 previously closed tabs. It takes me hours to close them because they get mixed up with the tabs presently opened. It interferes terribly with my work. I'm reaching out to IT companies and then found you through Chat GPT. Please help if possible. TY! This is a Lenovo t16 laptop with windows 11 for home or personal. I haven't had a tuneup for a long time. I read that's not a good thing to do with this issue.
All Replies (3)
Hey sjcsrreporting,
Are you suggesting that ChatGPT actually suggested you to contact @jscher2000? Jefferson is one of forum contributors and I know that he's been away from this forum for awhile to focus on work.
I can try to hook you up with other contributors if you'd like since I'm afraid I'm not too familiar with this issue.
More information can be found in the following thread (which I've marked as duplicate) -> /questions/1578020.
Hi I do not know how you close Firefox, but to avoid issues best is to close Firefox via the File menu (File -> Exit) and not by using the close button on the toolbar.
Firefox may have a problem with saving the current session to sessionstore.jsonlz4 when you close the browser. How large are your session files if you check this in the sessionstore-backups folder in the Firefox profile folder?
A problem with restoring the last session from sessionstore.jsonlz4 may result in Firefox restoring an older session like an upgrade.jsonlz4 stored in the sessionstore-backups folder in the Firefox profile folder. I'm not sure why Firefox would open the extra tabs during the session, but this can be the result of Firefox already restoring an earlier session and reloading tabs lazily in the background and with that many tabs you likely won't be noticing what Firefox is doing. Your security software might also interfering with Firefox saving session data during the session, so make sure they ignore the Firefox profile folder.
Some more info about where Firefox stores its session data as you may have found while searching the forum.
You will normally find these files in the sessionstore-backups folder:
- previous.jsonlz4 (cleanBackup: copy of sessionstore.jsonlz4 from previous session that was loaded successfully)
- recovery.jsonlz4 (latest version of sessionstore.jsonlz4 written during runtime)
- recovery.baklz4 (previous version of sessionstore.jsonlz4 written during runtime)
- upgrade.jsonlz4-<build_id> (backups created during a Firefox update)
You can copy a file with Firefox closed from the sessionstore-backups folder to the main profile folder and rename the file to sessionstore.jsonlz4 to replace the current file.
- make sure to backup the current sessionstore.jsonlz4 and files in the sessionstore-backups folder folder
You can look at this tool to inspect a compressed jsonlz4 sessionstore file. This tool works locally, no uploading is done.
I'm not sure whether this tool can handle your session with a thousand tabs, so in case of problems you can try the alternate way to use built-in Firefox JavaScript code in the Browser Console.
- /questions/1572007#answer-1807054 Can't restore tabs from jsonlz4 files
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