Hi

What happens when you try to connect Firefox for Android to your Firefox Account?

It connects. Both pc and android tablet are connected.

If you manually trigger Sync on the PC copy of Firefox, wait a short while then check Firefox for Android, do you see data come across?

No. Nothing happens.

Are both copies of Firefox showing in https://accounts.firefox.com/ under "Connected Services"?

Yes both are there.

I am able to send tabs back and forth but bookmarks won't sync. Both computers show up on both computers.

Do you have bookmarks set to Sync on both devices?

Bookmarks are set to sync on both devices.

Do you know roughly how many bookmarks you have?

If (on Firefox on your desktop) you open the bookmark manager, then select each bookmark folder and [down arrow], what is the total number of bookmarks you have?