Hi, if they are not on your Desktop in a Folder called OldFirefoxProfile and are not here :

• https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data

Then they have performed magic and disappeared as said. If they are there :

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

and you should always do this :

• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
• https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer

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

Are those profiles gone as well from the hard drive or is only profiles.ini affected?

Keep in mind that Windows System Restore can cause a lot of problems and should only be used as a last resort and that you should backup all profiles before doing a restore.

You can check if you have an orphaned profile that isn't registered in profiles.ini and that doesn't show in the Firefox Profile Manager. You can check that by opening the current profile folder via the about:profiles page and go up one level (..) to see if there are unlisted profiles present.

• C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\

If you have found an orphaned profile then you may want to recover some personal data or restore his profile.

You can recover an orphaned profile via these steps:

• use the Profile Manager to create a new profile
  https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
• click "Choose Folder" in the Profile Manager
• browse to the location of this profile to register this profile in the Profile Manager and use this profile

See "Profile was moved or renamed":

• https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible

Note that you should never use "Choose Folder" to specify a folder that already contains files that do not belong to Firefox. Only use "Choose Folder" to recover an profile that isn't listed in the Profile Manager.