Icon too tall Rated 3 out of 5 stars
As mentioned by Evertonian, the menu icon is too tall. This means if you have FF maximised and you push your mouse right to the top of the window, it does not automatically hit a tab like it should - you have to adjust down by a few pixels. For that reason alone, I shall not be using it for now.
Otherwise, great plugin; though it's frankly unbelievable that it's even required. Iconising the menu should be a standard option in the Firefox build.