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Recover old session before potentially accidentally deleting

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  • 1 am na jafe-jafe bii
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  • i mujjee tontu mooy cor-el

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I'm trying to recover a profile that has the most recent history, tabs and pinned tabs that I seem to have either lost or overwritten yesterday. I can try to reconstruct from my actual history but I don't remember everything I had open. I'm also not sure what to do with all the profiles that are associated with my browser. The version with my actual name is not the default and is an initial version I used on an older computer.A ny easy answers would be appreciated. It's frustrating that there is no way to contact them Mozilla directly.

Thanks

I'm trying to recover a profile that has the most recent history, tabs and pinned tabs that I seem to have either lost or overwritten yesterday. I can try to reconstruct from my actual history but I don't remember everything I had open. I'm also not sure what to do with all the profiles that are associated with my browser. The version with my actual name is not the default and is an initial version I used on an older computer.A ny easy answers would be appreciated. It's frustrating that there is no way to contact them Mozilla directly. Thanks

All Replies (5)

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Firefox restore a previous session before last from a jsonlz4 recovery file https://support.mozilla.org/bm/questions/1189759

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Thanks but where do I find the jsonlz4 recovery file? When I click on the root directory in the default profile 14 (which is what I think I may have accidentally changed) and have it show in Finder nothing is modified after March of 2021.

ellenceegee moo ko soppali ci

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Do you only have one profile folder if you go up one level ?

Location used for the main profile that keeps your personal data (Root Directory on about:profiles).

  • ~/Library/Application Support/Firefox/Profiles/

In Mac OS X v10.7 and later, the "~/Library" folder in the Home directory is a hidden folder.

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I"m not sure. It looks like there is an old profile with my name and a bunch of other profiles. There's 17 total profiles listed.

Profile: Ellen Profile: default-release-56 Profile: default-release Profile: default-release-1 Profile: default-release-2 (all the way through default-release-14 which is set as the default.)

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Make sure you install Firefox properly and that you do not launch Firefox from the DMG (Disk Image) file.

Open the Firefox Disk Image file and drag the Firefox application to the Applications folder on your hard drive. You shouldn't double-click the Firefox application to run it from the Disk Image, but instead drag it out of the DMG folder.


You can check the date and time of each profile and possibly compatibility.ini in a profile to see what Firefox version last used this profile. You can check the sessionstore-backups folder in a profile for useful session data.

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> (backup created during an upgrade of Firefox)

You can look at this tool to inspect a compressed sessionstore file.


Note that Firefox uses two locations for the Firefox profile folder. One location for your personal data (e.g. bookmarks) and another location for temporary files like the disk cache, so you may have to cleanup unneeded profiles in both location location.

Location used for the main profile that keeps your personal data (Root Directory on about:profiles).

  • ~/Library/Application Support/Firefox/Profiles/<profile>

Location used for the disk cache and other temporary files (Local Directory on about:profiles).

  • ~/Library/Caches/Firefox/Profiles/<profile>

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