Honestly Manifest v3 was contentious because it essentially nerfed adblockers completely -- and for that reason I really despise it.
But it sounds like exactly what you're asking for.
What is your alternative though? Surely things like this would need to access basically every website in order to be useful, and more-so on websites you'd never visited before.
You can always use something like chrome/firefox profiles which enable different plugins for different uses if that makes you feel safer.
> Surely things like this would need to access basically every website in order to be useful, and more-so on websites you'd never visited before.
Probably some kind of blacklist instead. E.g. This extension cannot run on these websites. We already have a more basic version of this with the allow running incognito option.