Thanks. Mastodon still requires executing javascript just to read a post, so I usually ignore it.
https://github.com/jwilk/zygolophodon
I've been working on a WebExtension that calls out to zygolophodon and returns plain HTML to the browser. In the process of rebasing it over recent changes but here is the working webext-old branch:
https://github.com/jwilk/zygolophodon/compare/master...pabs3...