Check this link

• https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them
• https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks
• http://kb.mozillazine.org/Backing_up_and_restoring_bookmarks_-_Firefox#Restoring_bookmarks_from_backup

If you selected the un-install option to "Remove my Nightly personal data and customizations", you deleted all your Firefox data. There is no real difference between Firefox release versions and any of the pre-release versions - Beta, Aurora, and Nightly. That "option" will delete the entire Firefox Profile folderset in App Data. It doesn't discriminate between the different versions of Firefox a user may have installed. Plus, unless you created a new Profile to use specifically with the Nightly version, Nightly would have been using the same Profile you were using with Firefox (release version).

Sorry for your loss of data. I used that "option" when I was testing the Firefox 3.0 Beta version when that option was first introduced; I had a similar loss of all my Firefox data, but for me it was 6 Profiles for the different versions of Firefox I was running at that time.

I filed a Bug report about how "destructive" that option was, but all that happened was that the "warning message" was worded a little more strongly.

Thanks for the link. Checked out my profile and everything is gone. Only profile is from yesterday after removing Nightly.

That's exactly what I did and chose yes while I was distracted on the phone =( Stupid me for doing it, I just hope there is a way to get it back.

You could try using a file recovery utility program like Recuva. You would need the places.sqlite file from the deleted Firefox Profile folder.

the-edmeister, I will try that. Thanks

It may be more reliable to try to restore JSON backups in the bookmarkbackups folder (bookmarks-####-##-##.json) because that are smaller text files that allow easily to check if the recovery went well. The places.sqlite file is a large (at least 10 MB) binary file that can easily get corrupted is the cluster chain has been damaged (clusters have been reused already). With the JSON backups you have 10 chances to restore at least some bookmarks.

I have good news for you or anybody with this problem. The exact same thing just happened to me, so I went over to the profile folder (click on the start button, and search for "%APPDATA%" without the quotation marks), then go to these folders: C:\Users\"your username"\AppData\Roaming\Mozilla\Firefox\Profiles, and there you should find your old profile with extensions and bookmarks (It's the larger one, with the extension and bookmarks sub folders). Just copy all the content from that folder into the other one that was just created with the new profile, and you should have everything back.

Not if you have uninstalled Firefox and did choose to remove your personal data.
If you do that then all profiles will have been removed and that includes profile created by other Firefox versions, so you should never place a tick in the box to remove personal data when uninstalling Firefox.

Thanks for the suggestion SANAFABICH, however, it did not work for me. When I tried to search "APPDATA" all that came up was an appdata folder for Microsoft.net framework... I tried changing the spacing and caps around but nothing...

The "Application Data" folder in XP/Win2K and the "AppData" folder in Windows Vista and Windows 7 and later versions are hidden folders.

• http://kb.mozillazine.org/Show_hidden_files_and_folders
• http://kb.mozillazine.org/Profile_folder_-_Firefox

As already posted, if you have uninstalled Firefox and removed your personal data then all your profile folders are gone and you need an undelete utility to recover your profile.
If you lost a profile via other ways then you might be lucky to recover the profile or data in it if that profile is still present on the hard drive.