I just updated to 16.02. I got the problem I saw others complaining about. There's a blank space where the Bookmarks Toolbar should be. It's selected in View. If you uncheck it, then check it again, it pops up. Then it's gone the next time you load FF. For me I'm pretty sure the solution was to update Tab Mix Plus. I just went in and hit the Check For Updates in the Extensions window. Seems to be normal now.
Also I faked its ass out by unzipping and editing all the *Places AddOns changing the max setting to 16.*
Didn't get any hassles when loading about using SyncPlaces,CheckPlaces or SortPlaces. Mozilla has a page if you search with detailed instructions how to unzip .xpi files and change the setting. Guess they have to with the ridiculous version number jumps.