I would love an option that allows me to set defaults for all websites that I visit. Such as to reject marketing and tracking cookies and other mechanisms used for that purpose globally and to allow me to fine tune functional stuff on a per-site basis.

Mozilla has this for Firefox

https://www.ghacks.net/2022/12/24/configure-firefox-to-rejec...

Of course that page just had to pop up a modal consent banner first...

Rejects/Hides/Accepts depending on the situation. Not ideal, but hides a lot of these messages.