Previous session doesn't restore. 'Restore Session' tab grayed out.
Sometimes when I start firefox there is no option to restore the previous session, and the 'restore session' option in the menus is grayed out.
This tends to happen after I've had Firefox closed for a longer than a day or two.
This is happening in Firefox version 70.0.1 (64-bit) on Ubuntu.
Additional System Details
Adblock Plus LastPass ruler Serpstate Website SEO Checker Fireshot Temporary Containers Video DownloadHelper Web for Android Messages Zoom Scheduler
- User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:70.0) Gecko/20100101 Firefox/70.0
You may have corrupt sessionstore [v56] sessionstore.jsonlz4 file(s). Delete all sessionstore* files and the sessionstore-backups folder.
Type about:support<enter> in the address bar.
Under the page logo on the left side, you will see Application Basics. Under this find Profile Folder. To its right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.
Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
Linux: Under the page logo on the left side, you will see Application Basics. Under this find Profile Directory. To its right press the button Open Directory.
Locate the above file. Then rename or delete it. Restart Firefox.
Don't delete the files if you need to rescue any data from them, just move them out of the profile folder to some location where Firefox doesn't look for them. You can try to read out their contents using this tool: https://www.jeffersonscher.com/res/scrounger.html