Rated 5 out of 5 stars
WOW...this is a neat extension. Really like it. Works as stated.
One problem though, when I open tabs in background or foreground by dragging the links using the "Easy DragToGo" extension or any others like it...the tabs are not indented as they should be for trees...maybe this extensions doesn't see those links originating from the same page.
Still it is a good concept so I give 5 stars.