I read the or's as giving alternatives, only one of which needs to work.

I can see how other interpretations are possible, but I don't see anything especially generous about mine. I'm not "allowing" anything: To make a judgement you have to pick a web browser to try it with, and you'd probably pick the most popular one, in the most popular configuration, that seems the most fair. If that web browser happens to execute Javascript when you navigate to an URL, then that's just how it is.