There has never been any comparison to this add-on; it has always been the clear winner Rated 5 out of 5 stars

Thank you for keeping up with this one vis-a-vis SeaMonkey! My eye condition dictates that I must use this add-on both day and night (or wear sunglasses when I surf).

Best in class! Rated 5 out of 5 stars

The most advanced extension for protecting light-sensitive eyes, especially in the evening. I actually leave it on during the day as well, it's that good!