I tried two different window maximizers before this one. Neither one of them did anything. I checked the settings but they were of no help. So imagine my surprise when I tried this one and it actually worked immediately! Not only did it work for the web game I was playing, but it actually added a nice looking border around the game that is not there otherwise. I'm not sure how that works, but it sure was a nice surprise!

As a privacy-conscious user I like that it doesn't require any particular permissions namely "Access your data for all websites" as is done by similar extensions.