I've noticed my open tabs do not sync automatically like it does when I move from desktop to my Android device. Example scenario to explain this better:
I'm on my desktop Firefox with several open tabs. Then I pick up my Android device (4.2 Jelly Bean) and open Firefox Android, and I go to open new tab and chose the "Sync" menu, unfortunately the tabs it shows from my desktop device are not up to date at all.
In fact the only way I've found to sync up these tabs is to go on my Android device under Sync -> Firefox Sync -> Menu Button -> Sync Now. Then my tabs update perfect, but shouldn't this just happen automatically, or at least from a "Sync Now" button right in Firefox Android? Am I completely missing something obvious?
Re: Automatic sync not working on Firefox Android?
I have this problem too and I doubt now it's OK with server load.
Just manual sync helps me to get opened on my laptop tabs on the phone and vice versa.
Otherwise I see on about:home tabs that have been opened several hours ago.
There are no any errors during sync, sync status is OK, and sync time is fresh.
FF 24, Android 4.1.2, Sony Xperia V, +5°C, rainy.