This especially drives me nuts because I use text selection to help with reading on ultra-wide pages when I scroll so I don't lose my place. I hate when I can't select text.
Medium won't even render on my old iPad. Just crashes the browser tab on load. I seriously don't know how bad your tech must be if you can't reliably deliver a page of text.
Writing on a piece of paper and throwing it to the wind?
Seriously, though, if you have an inch of computing skills, any of the static site generators combined with a free tier CDN like Netlify. The most popular generators are pretty easy to use.
But perhaps I'm underestimating how hard that actually is.
Yes, with uMatrix. Its like ublock but much more configurable. In one dimension you have cookies, images, js, xmlhttprequest, frames, etc; in another dimension you have domain, subdomain, TLD of the site URL; and in the third dimension you have domains that your current site is connected to. Each is configurable at different levels.
It is archived though. The developed stopped working on it I believe
The other way is with the Multi Account Containers, Temporary Containers, and Containerize addons. Make permanent containers for sites where you want to allow cookies to be saved. Let everything else open in temporary containers. Shortly after closing the temporary tab, all cookies (and local storage, etc) for that tab get deleted. Permanent containers keep their data. Containerize lets you add matching rules to URLs without having to visit that URL in a GUI. Handy for redirects.
I use Vivaldi, but on most browsers there is an "Accept Cookies" setting that is tri-state: All, Session Only and Never (third-party cookies is a parallel setting). You can change it to "Never" then set up site-specific exceptions for the sites you do want to allow cookies on, e.g. Hacker News.