Header-Editor is an extension that will allow you to create and use arbitrary HTTP headers in Chrome. The following permissions are needed for Header-Editor to run: - webRequest - Used to access the requests being sent out. - webRequestBlocking - So that headers are modified before being sent. - - All URLs are asked for since the extension cannot know ahead of time where it will be needed. Note: Response headers do not appear in the Network Inspector, however they are supplied to your code. For more details, see: - http://hexcoder.us/2013/08/08/response-headers-and-chrome-extensions/ - https://code.google.com/p/chromium/issues/detail?id=258064