I wonder if there is a popular way for the user to pin a hash of a webpage (to be warned if it changes)? IPFS probably has a way to do hashes of pages, but for other hosting methods, maybe a popular extension to verify contents of the site would be good. Like a hash for the whole page that can be verified. I think I saw a site specific thing for doing that but popularity across multiple sites would help adoption. It's weird that Some of the Javascript has resource hashes and some doesn't. Not that this makes it especially more secure...