Rated 5 out of 5 stars

This is simply the best html validator that exists for Firefox. Nothing else even compares.

I have no constructive advice (because its so great) other than it sure would be nice if it worked for the very latest version of firefox. I keep Firefox 3 on my mac for one reason and one reason only: this add-on.

This review is for a previous version of the add-on (0.9.0.6).