I think I've seen an extension (?) that would auto-save every webpage to your device, probably on r/datahoarder, that I'm still trying to find. I also have used a relatively easier auto-archive-to-wayback-machine extension that's probably close enough for most people.
I have this set up with archive box. Unfortunately, if you do much browsing, it will very quickly saturate memory and CPU on whichever machine is running the archive box. It also gets really big, really fast. There are also increasingly websites that are blocking it, so when you look at the archive it is either empty or worthless. Still worth it to some people, but it does have its challenges.
