In regards to using stylus to block a fwe custom elements, you can also use uBO's cosmetic filters[1] instead. Converting stylus' styles to uBO filters is easy enough if all you are using them for is hiding a few elements. I guess this has very limited use to you though if you also use stylus' themes, as it won't let you remove an extension.

https://github.com/gorhill/uBlock/wiki/Static-filter-syntax#...

Well thank you good to know, ill have to start experimenting to see how well it meets my needs. I mostly use stylus to to dark theme sites , remove side bars footers and headers, then expand the main article column to be 80 - 100% of the page. I really enjoy just reading an article with no distractions. (reddit is a pain)

If you want, I can help you with that some. I know more than I probably should about how uBO filters work.