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lost bookmarks

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Bookmarks lost when firefox add-ons updated. Desktop shows folder named "Old Firefox Data" Inside is a folder named "25fxn4vd.default" Inside that folder is another folder named "bookmarkbackups" Have no clue how to use info in this folder.

Bookmarks lost when firefox add-ons updated. Desktop shows folder named "Old Firefox Data" Inside is a folder named "25fxn4vd.default" Inside that folder is another folder named "bookmarkbackups" Have no clue how to use info in this folder.

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How fresh are the files in the bookmarkbackups folder? The creation date should be encoded into the file name, such as this one created yesterday:

bookmarks-2020-09-22_999_gibberish==.jsonlz4

You can apply one of those backups to your currently running Firefox by using the Restore menu, "Choose File", in the Library window. The following article has the steps:

Restore bookmarks from backup or move them to another computer

If that gives an error, could you let us know what you get when you run the "Verify Integrity" function. That's here:

Open Firefox's Troubleshooting Information page using any of these methods:

  • "3-bar" menu button > "?" Help > Troubleshooting Information
  • (menu bar) Help > Troubleshooting Information
  • type or paste about:support in the address bar and press Enter

Near the bottom, there is a section titled Places Database -- that's the file which stores history and bookmarks. Click the button labeled Verify Integrity. There may be a 10-15 second delay before results appear.

If all is well, the report that appears below the button should start with:

> Task: checkIntegrity
+ The places.sqlite database is sane
+ The favicons.sqlite database is sane

Does yours say that, or something else? You can select and copy the report, and then paste it into a reply for review and comment.