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I´ve lost all my bookmarks when updated to the latest version of firefox.

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which software do I need to open the file where my bookmarks should be inside after updating the version? I´ve tried everything, but I can´t open the file.

which software do I need to open the file where my bookmarks should be inside after updating the version? I´ve tried everything, but I can´t open the file.

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You can't open a compressed .jsonlz4 in other software, only Firefox can open such a file via the Bookmarks Manager.

You can check for problems with the places.sqlite database (bookmarks, history) in the Firefox profile folder.

See also:


You can restore a JSON backup in the bookmarkbackups folder in the Bookmarks Manager (Library).

  • Bookmarks > Show All Bookmarks > Import & Backup > restore

Restoring a JSON backup will replace all current bookmarks.

The name of a JSON bookmarks backup file includes a total item count (folders and separators included) and an hash value to prevent saving the same backup more than once.

  • bookmarks-YYYY-MM-DD_<item count>_<hash>.jsonlz4.
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Did Firefox perform a Refresh during your update? The tell-tale sign is an Old Firefox Data folder on your desktop with a freshly updated, semi-randomly-named folder inside. You can use this folder to recover bookmarks and various other data. We can explain how if it's relevant.