Rated 3 out of 5 stars
There should be a toolbar button for this add-on!
Why there is only the add-on bar button?
I never use the add-on bar because it takes space, and I think I am not the only one.
I've changed this behaviour in the newly available version 0.15. Now the icon is only added once to the add-on bar on the very first install. After that the icon can be moved/removed with the normal browsers toolbar customize function (and stays there after restart) via drag & drop.