How can I add a browser/web game as a non-Steam game to my library?
- Add your browser (Firfox / Chrome ...) as a non-Steam game
- Go to your library, right-click the browser and select Properties
- Add the url as an command line argument:
If you wan't to change the name of the game or the icon you can do this in the properties panel (Step 2).
If you wan't to open the game in a new window:
- Firefox : -new-window url
- Chome : --new-window url
I've tested it for Chrome an Mozilla Firefox
Hope it helped :)