Sure, there exists an extension for pretty much everything, but it's not an ideal situation that you need to install an extension for stuff like this.
Also, having too many extensions slows down the browser (because they need to parse/manipulate DOM) and extensions themselves are also a security/privacy risk and finding the good ones for every browser can be tedious.
Besides, my mom has no idea what's "a browser extension".
Most people just need one extension: uBlock Origin (or built-in Opera/Brave adblock) with a filter list from prebake.eu. No more ads and cookie banners. Easy as that.
I'm using this setup, and I still get cookie/ToS banners all the time, especially using Google (I think I'm accepting their new terms of service 4/5 times each day).
Also, having too many extensions slows down the browser (because they need to parse/manipulate DOM) and extensions themselves are also a security/privacy risk and finding the good ones for every browser can be tedious.
Besides, my mom has no idea what's "a browser extension".