One of my faves, with one minor flaw Rated 5 out of 5 stars
This has been one of the add-ons that I immediately install with a fresh d/l of Firefox. Love that I can just make comments go away rather than risk the buzzkill of stupid, stupid commenters.
However, it is a bit over-enthusiastic about what it blocks. It also hides all form fields with the name/id "comment", which on many sites includes the search box or login box. It means that I have to submit certain forms twice, and occasionally miss feedback boxes that are not visible onscreen at first glance.
Perhaps there's a way to adjust it so that it only blocks CSS "comments" in static text and skips over "comments" in form fields?