Yes. I think I found what I needed. I just haven’t tested it out yet. I wish it were as simple as clicking the box like it is for Windows and Mac builds, but HTML requires a little more work.
Changing the viewport worked great and was really easy to make my game play larger in browser, but I still want users to have the option of going completely full screen, no matter what size their screen is, same as if they were playing a downloaded version.