My biggest surprise was learning there are gay and Trans Republicans. Like, how does that even work? unless you are trying to demonstrate people what irony looks like, it is big brain time.

Is it a site-by-site implementation of Firefox containers?

I host an instance of searxng and I am quite happy with it. It displays results of a combination of engines. If you want to spin up your own, I have a blog that explains how to do in basic steps : https://mustafacanyucel.com/blog/blog-13.html