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I have just upgraded to Firefox 52.7.3 64 bit and all my bookmarks and history have disappeared!

  • 2 replies
  • 1 has this problem
  • Last reply by Shadow110

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The upgrade was from the previous 64 bit version. Also, have tried to the restore option but always get the message "Unable to process backup file" - extremely frustrating.

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HI. sorry to hear that. Please check on your desktop for a folder called OldFirefoxProfile. If it is there it maybe possible to rescue some data.

Also please check to see if Firefox just created a new profile and that your old one is still there :

As to Restore, no idea what you are trying to restore from. Win7 ? If so it will not work. If your Profile is not in the places I mentioned then some how it was determined it was corrupted and was deleted. fyi for the future :

Please let us know if this solved your issue or if need further assistance.