Firefox (Not) Sync

Usually, my copy of Mozilla Firefox on my Mac will periodically sync my bookmarks to the cloud via my Firefox account just fine. But every so often, I’m finding that it’s stuck while syncing. That wouldn’t be a problem, except for the small matter of all my bookmarks, as well as my download history, disappearing until I quit and restart Firefox. Annoying! I’m seriously considering switching over to Safari, just to get shot of this issue once and for all.