FF searches open tabs when you type in the url bar. (Officially the "Awesomebar" and the name is kind of earned but it is to cool for me.) Also many of us (I t

FF searches open tabs when you type in the url bar. (Officially the "Awesomebar" and the name is kind of earned but it is to cool for me.) Also many of us (I think) use some kind of vertical nested tabs.