These can be your second addon Rated 5 out of 5 stars
Idea : " A addon that hides Orange Firefox menu Button from titlebar & displays it on a Toolbar. (Make it like Chrome's Setting Button)
1. Movable Firefox Button
Pros : can Move Firefox Button to Toolbar
Cons : If we Move Firefox Button to Toolbar it still look like the big Firefox Button (not like Chrome's Setting Icon) which loos awefull. so addon itself becomes useless
2. App Button Remove
Pros : Removes the orange Firefox button from the title bar
Cons : cant display it as Toolbar button.