Are you sure that you are staying connected to your Sync account? Sync has always required some massaging, but this latest version needs some serious hand-holding. For me, this latest version of Sync is almost always timing-out after 5 -10 seconds and yet everything appears as tho I'm still connected to Sync. This might be what you're experiencing as well.

Load the Sync options page and click on the Manage button and see if you get the session expired message. If you do, sign in again and don't do anything (stay on the manage page) and see if your bookmarks come back. Hopefully your bookmarks will restore and if they do, export them to an html file so you won't have to rely on Sync next time.

I loaded up the sync options page and showed that I was logged in. I went ahead and disconnected and logged back in, staying on the manage page and nothing has happened.

Hi, you can try this: Open bookmarks > Show All Bookmarks > Import and Backup > Restore, and see if you have a backup there.

If not, please see -

• Profiles - Where Firefox stores your bookmarks, passwords and other user data.

• Recovering important data from an old profile.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you.

I think they're permanently lost. I had them when I upgraded to Windows 10 but somehow I lost them revering back to Windows 8.1. When I go into show all bookmarks and try to do the recovery option, there's only yesterday and today's date. I choose yesterday's date and nothing happens. I appreciate everyone's help though! I guess I learned my lesson.

Ah ha! I was looking through different threads on the support page. The other day I did reset my password but did not receive any warning of the following:

I’ve forgotten my Firefox Account password — how do I reset it?

To get a new password follow these steps. Warning: Any data you have on the server will be erased when you reset your password. Your other devices will stop synchronizing unless you update them with the new password.

What's the point of resetting your password if everything on that account gets erased?

trumpet89 said

What's the point of resetting your password if everything on that account gets erased?

I've always wondered this myself actually....??

You may want to reset the password for the Firefox account when you have forgotten it, but this password is used to internally generate the Sync key that is used to encrypt data before uploading, so without the correct password it is no longer possible to decrypt your data stored on the Sync server and therefor this data is removed. You always have to make sure not to forget this password to avoid losing your data.