Firefox wont let me restore my missing bookmarks
My bookmarks disappeared two days after installing new version. When I try to restore from an older backup it says "unable to process the backup file." When I try to restore bookmarks from a newer version it says "Unsupported file type."
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Look on your desktop. Do you see a folder called; Old Firefox?
https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
Your System Details shows;
Mac OS X 10.10 Firefox 31.0
Why are you using such an old browser?
Firefox 32+ switched from regular .json files to compressed .jsonlz4 files. That could be why Firefox 31 can't handle the newer format.
If you had trouble finding the current installer, see:
https://www.mozilla.org/firefox/all/
Or to use the internal updater, see: