Just one. Playing two at once would be tricky, I’d need like a second computer or something. And switching back and fourth between keyboards really quickly would probably lead to lots of deaths.

I’ll be back in five moons, we’re running out of mammoth meat (translation)

It’s not compiled into Firefox ever. A binary blob is downloaded after the first time you activate DRM. So just don’t activate it and it’ll never be present on your machine.