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.

It's possible there is a delay in Sync and the data will show up eventually, but until then, there is an add-on that lets you confirm whether in fact the Sync server is storing any of your bookmarks at the moment. Here's how to use that:

(1) Install this add-on:

https://addons.mozilla.org/firefox/addon/about-sync/

(2) Once that is installed, type or paste this "address" into the address bar and press Return to load this page:

about:sync

The add-on should present a list of categories. Expand the Bookmarks category to see what is in there (there should be a table listing exactly what is on the Sync server). Is your data there, just not showing up in this new installation of Firefox?