Limit Third Party Cookies

This is a general purpose first party origin trial that will allow sites to limit third-party cookies to perform broader testing of long-term alternatives, ahead of the eventual phaseout of third-party cookies scheduled to take place in early 2025 in consultation with the CMA. Websites that rely on third-party embedded content or services can use this trial to limit third-party cookies while they work with those third-parties on long-term alternative solutions for their users based on technologies, such as CHIPS, Storage Access API, Related Website Sets, FedCM, etc.