Rook: Other arguments from two years ago.
Life has gone by since and Chrome and Firefox perform on the same level nowadays.
Read Arima's previous answer about the drivers and stuff, since you are tech-savvy, unlike people who play games in browser according to you, you might find the way to finally fix your performance issues.
Also if you had been following/learning to use C2 during those past two years, you'd know now that the browser plugin allows fullscreen without having to press F11 in a workflow that suits the users control scheme and allows for a screen title that looks very much like a launcher of so many "native" games.
Concerning the size of the download, yes 32 megas is a lot for a "game" made of only a circle.
But on the other hand, when I watch the list of the last games I've bought through the humble bundle, most of them are several hundred of megs.
When I watch the list of the steam games I've installed, most of them are in gigabytes.
A finished game in node-webkit would be several hundred of megs with the "overhead" of 32 megs which represent a small fraction of it.
If you only play games that are a few dozen of megs, I'd think that it doesn't matter if you have a "gamer" graphic card because it's unlikely such a game will take advantage of it anyway.