I wrote this extension after seeing a really similar feature in the popular Reddit Enhancement Suite. It's open source here: https://github.com/quadnix/hackernewslc
I really like the idea, but it doesn't seem to work for me.
It opens two tabs: the second is the link but the first is just the homepage of HN.
Thus is very odd. Why is it better than right-clicking?
Nice idea, but all this seems to do is hide the post.