> I wish there were an API to build such a firewall, e.g. as a part of a browser extension, There was in Manifest V2, and it still exists in Firefox. https://

> I wish there were an API to build such a firewall, e.g. as a part of a browser extension, There was in Manifest V2, and it still exists in Firefox. https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/Web... That's the API Chrome removed with Manifest V3. You can still log all web requests, but you can't block them dynamically anymore.