Windows links are here. As for android, you’re right, it is not maintained anymore; the most similar still-maintained browser I could find is Cromite, but I’ve never used it before so I can’t comment on it.

Whichever works best for you. I would recommend Wayland to anyone, but if you run into any problems with it (either bugs with your compositor or protocol limitations), then just use X11.

foot is great. Simple, fast, and customisable enough for my needs.

Rather, use un-googled chromium. Brave is kind of bloated with all of the extra “features” they have.