“The extensions will still work, but Google says it will disable them on your browser in the “coming months” before removing the ability to use them completely.”
Manifest V2 starts dying in Chrome Beta, Dev and Canary on June 3, with stable Chrome following by early 2025. Google sells it as security because V3 bans remotely hosted code. It also caps what ad blockers can do through the declarativeNetRequest API. The world’s largest ad company gets to write the rules for the tools that block its ads.