Block 3rd party scripts option in Brave Shield?

Brave Shield only has options to Allow ALL scripts or Block ALL scripts. What about 3rd party scripts? From what I can see, some are parsed directly from advertisers webpages and stuff and while it seems some of it get blocked, what about adding option “Block 3rd party” for Scripts to prevent this as whole if you want to block everything that doesn’t originate from the website you’re viewing?