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.

I had no firefox on my phone. firefox was installed on my computer. I pressed sync. after that I reinstalled the OS on computer and downloaded the firefox again. logged into my account firefox. after synchronization bookmarks did not appear ((((

Did you wait long enough to let the initial first Sync to finish properly as it can take considerably time for uploading all data ?

I have been waiting for a very long time. bookmarks did not appear. nothing helps. can you help me recover them ??!? there everything is very necessary for me. bookmarks and passwords. all my life!!

It was similar for me, so save your bookmarks in other places too. But maybe you should have a look at this page https://support.mozilla.org/de/questions/1314007 Maybe it can help.