It would be nice if the sync function actually synced something other than just my bookmarks and my browsing history between my Firefox installations. I mean, I checked all the boxes, so theoretically it should...but no...it never does. Toolbars don't sync -- I know, for some reason that's "by design" (or laziness?) -- Settings don't really sync much (maybe a few do when the moons of Jupiter and Uranus are in perfect alignment).

Could you maybe consider syncing the various exception lists in the Settings?