Hi

Thank you for your question about the Firefox Sync service.

It appears from your question, that you are using Firefox Sync as a back up service. This is not what Sync is designed to do. The Firefox Sync service takes a copy of the data you wish to include and transfers it to a second device (typically a mobile device such as a tablet or a telephone) running a copy of Firefox. The storage in between all attached devices is both temporary and fragile and is not stable enough to be (and is not designed as) a reliable backup service.

If you have a copy of your Firefox profile for desktop Firefox, you may be able to recover your bookmarks and other data. Please have a read of this article.

If you have a copy of your data on a mobile version of Firefox, please follow these instructions to connect it to Firefox Sync to copy your data.

While i was waiting a reply to this thread, i've installed firefox on my iPhone and... there are all my saved passwords!! so i think that the problem is on my computer!

PS: i noticed that my last sync was on 1st gen (not true because I have formatted today the PC) probably the sync is partial or someting like that.

Do you have a C:\Windows.old folder?

No, sorry it's a new installation from USB device

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily. Thank you for contacting Mozilla Support.

Note that Firefox might not sync passwords when you do not use a master password.

• https://support.mozilla.org/en-US/kb/use-master-password-protect-stored-logins