Not exactly what your are looking for, but mihon (formerly tachiomy) fixes my webcomic need. It is both a reader and a downloader. You have different scrapping extension for many sources, thus you can pretty much find anything. If you are fine with a (android) phone only workflow, I recommans you give it a try.

https://anubis.techaro.lol/docs/user/known-broken-extensions

If you have JShelter installed, it breaks the proof of work from anubis