I dont know who are the people who decided to put the extension icon on the toolbar
that right corner is MINE and mine only, so I decide what to put there - usually the tool I use most
now, at least you should make that piece movable, as other icons in the toolbar are
again, who are you and how do you decide without even asking us, and how do you put a half-baked items into the product without thinking - well, not so far - in advance about the reactions you may get...?!