pls dicuss
I want make do this, too.
I normally use ScriptSafe on Chrome, for example. Not the most popular JavaScript blocker, but I've developed a routine with it over the years.
From a professional standpoint, it allows me to see and intercept any Javascript trying to do third-party funny business with cookies, tracking, etc. But from a personal perspective, it allows me to do de-facto custom ad and media blocking beyond what you get out of the box with a basic ad blocker plug-in.
Though you often have to pause it sometimes for things like buying stuff at checkout sites with credit cards, because a lot of specialized payment flows and the like will get rejected.