I think this is the relevant API: https://developer.chrome.com/docs/extensions/reference/webRequest/ https://developer.chrome.com/docs/extensions/reference/webR

I think this is the relevant API: https://developer.chrome.com/docs/extensions/reference/webRequest/ https://developer.chrome.com/docs/extensions/reference/webRe... > As of Manifest V3, the "webRequestBlocking" permission is no longer available for most extensions. Consider "declarativeNetRequest", which enables use of the declarativeNetRequest API. Aside from "webRequestBlocking", the webRequest API will be unchanged and available for normal use. So the other functionality, to inspect web requests, will still be available.