> With Manifest V2, it was possible to inject a "Referrer" HTTP header if necessary. With Manifest V3, it's no longer possible. Not entirely sure of how this i

> With Manifest V2, it was possible to inject a "Referrer" HTTP header if necessary. With Manifest V3, it's no longer possible. Not entirely sure of how this is true. A recent V3 extension I've built is able to inject both the "Referer" and "Origin" headers using a declarative net request ruleset: 1. manifest.json (referencing the rules.json file): https://github.com/dedoussis/icloud-hide-my-email-chrome-extension/blob/main/src/manifest.json#L19 https://github.com/dedoussis/icloud-hide-my-email-chrome-ext... 2. rules.json: https://github.com/dedoussis/icloud-hide-my-email-chrome-extension/blob/main/src/rules.json https://github.com/dedoussis/icloud-hide-my-email-chrome-ext... 3. Relevant docs: https://developer.chrome.com/docs/extensions/reference/declarativeNetRequest/ https://developer.chrome.com/docs/extensions/reference/decla...