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When I try to check the box to open previous windows and tabs on startup it won't let me. Why not?

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  • Last reply by FredMcD

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When I try to check the box to open previous windows and tabs on startup it won't let me. Why not?

duplicate. https://support.mozilla.org/en-US/questions/1361612

When I try to check the box to open previous windows and tabs on startup it won't let me. Why not? ''duplicate. https://support.mozilla.org/en-US/questions/1361612''

Modified by Andrew

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Are/were you using Private Browsing? If so, history would not be recorded.

Profile data can be removed or not recorded in several ways;

  • 1) Running Firefox in Private Mode (nothing is recorded)
  • 2) Privacy settings; (In the address box, type about:preferences#privacy<enter> in the address box.
  • 3) Many disk cleaners and anti-virus type programs can remove data from browsers
    Open their settings and have them leave the browsers alone.
  • 4) Mal-ware.

You may have corrupt sessionstore [v56] sessionstore.jsonlz4 file(s). Delete all sessionstore* files and the sessionstore-backups folder.

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


Type about:support<enter> in the address box.

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.