Ask HN: How do you save web page content

I have been saving web page content over the years in various ways. Plain text, print as PDF's, etc etc.

How do you all do it.

For example - if we wanted to save this web page locally how would you do it?

https://forums.linuxmint.com/viewtopic.php?f=42&t=368501

It's a long nicely formatted, color web page that I would not want to save as a text file. I used to just bookmark these things, but then when I want to go back (sometimes a couple years later) the web page is 404.

I am testing this https://historio.us but it's not free and I can't save my own data on my own hard drive.

I guess I would save that as a PDF but I was wondering how everyone else manages a knowledge base of which the source are web pages.

What we need is a version of historio.us that runs locally.