I'm using Opera and want the same thing. And middle click is no options since i need 2 link opening gestures (down -> open in new tab; down,up -> open in new tab in backround). Right now i'm using Operas mouse gestures and got Opera disabled in StrokeIt, but that kinda sucks because i can't use the global action in Opera then :(
So it would be really cool if there was some way to detect/open links with StrokeIt.