Unfortunately the developers of those particular things (often like ad developers) use obscurity of things like div names to make the task less trivial.
>Not anymore, firefox has it by default now, just gotta turn a setting on.
I don't use Firefox as my main browser. I use Yandex. I do sometimes wonder if HTTPS everywhere is becoming a bit redundant these days anyway. Most sites seem to have moved to HTTPS these days.
>Sadly this [uMatrix] is dead
Yes, that's a shame. It still works though. Hopefully whoever takes on the task of keeping it alive via a fork will make it a bit more mobile friendly. [The same could be said about uBlock Origin]
Now if only someone could come up with similarly useful extensions that got rid of the other two forms of cancer that are ruining the internet:
1: Cookie consent dialogues*
and
2: Those modal overlays that suddenly cover up what you're reading and ask you to subscribe to some poxy newsletter or mailing list.
*not "I Don't Care About Cookies". It slowed my browser to a crawl when I installed it.