Leaderboard

So I've been trying a few extensions and noticed that the address bar gets filled pretty quick with icons. In fact, just using all the built-in ones (Adblock, Resource sniffer, Developer tools etc') already takes alot of space. Is it possible to control the amount of icons shown? Maybe add a show/hide option in the extension manager? Or group them up somehow? Also, when clocking "remove" on the icon of addons/extensions it says "You can hide the button of this extension in Customize UI". Well I looked for it, don't know where that is... I can only find the extension manager and enable/disable them...