Yes, that's an extension I use, too. So many web designers seem to be insensitive to glare! Especially a problem for those of us that use OLED displays, which tend to have a wider dynamic range (blacker blacks, brighter whites).
When I was doing web design, I used to have info about alternatives to the blinding white that so many web sites used...I wonder if I still have them in the bookmark collection? I'll have to look.