Can vouch for Hister! In the fairly short time I've been using it, I already had a few sites disappearing or changing content and hister kept the juicy information accessible.

It was painless to set up and quick to use when needed, too.

I also use Singlefile and Obsidian Web Clipper a lot, but Hister has been great and is now a first-class citizen in my system. It helps it works passively for those things that don't look important when you read them, but become relevant later.