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.

If you have changed your Firefox Account password, any data that is currently in sync between devices is deleted.

Hello,

Thank you for your answer but this doesn't solve my issue. The problem is that yes, I have another PC synced to this account but it is somewhere else and I don't use it now (no other phones or tablets were synced). I have reinstalled before the OS and after I was logging in, everything appeared like before (bookmarks, passwords, etc.) The problem this time was that I forgot my password and also the Recovery Key. So, I proceeded to reset the password without the Recovery Key. After this, my bookmarks and everything else disappeared. Consequently, I am asking if there is any possibility to recover my data.

Thank you!

You would need to sync it across from the other device or copy the bookmarks file from that device.