Would this still work with 3rd party cookies disabled? In the years I've used uMatrix[0] I can't remember a single case where sending a cookie with a 3rd party

Would this still work with 3rd party cookies disabled? In the years I've used uMatrix[0] I can't remember a single case where sending a cookie with a 3rd party request was needed. Why do browsers do this still? 0: https://github.com/gorhill/uMatrix https://github.com/gorhill/uMatrix