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.

Firstly, thank you for your reply. I have been using Firefox for over 10 years and have never had this problem. Since I reset my system, I can simply log in and all my bookmarks appear. So as far as I understood I was using the sync option in the wrong way as I thought all my bookmarks etc were stored directly in my account. I read the article you sent me and thank you for that, but it did not help me fix my problem.

So as I understand it, there is no way to restore my data now before I reset my operating system?

One of my favorite discussions that is closed for some reason. https://support.mozilla.org/en-US/forums/contributors/707681#post-86895