Don't know about parent poster, but I think: a) It's better to have it baked into the browser in general, if it's something you use. Worse if it's not, though.

Don't know about parent poster, but I think: a) It's better to have it baked into the browser in general, if it's something you use. Worse if it's not, though. b) Screenshots with selectors are pretty awesome, and I don't think most extensions would provide that