Modify ongoing requests using the Firefox Add-on SDK
Use with care, as it can slow down requests drastically, since the handler is ran sync and blocks the request from getting sent/received.
It's generally advised to try an alternative method from MDN: Intercept Page Loads instead. This implementation covers the "HTTP Observers" part.
Please first consider using WebRequest.jsm instead of this module. I hope to eventually move this module to WebRequest.jsm too, if possible. This will also add the possibility for normal events that can't modify requests.
To install the module, run npm install --save requestmod in your
extension's root directory.
You can then use the module inside your extension in the following manner:
var { RequestMod } = require("requestmod");There is inline documentation in the JSDoc style, or alternatively there is a prebuilt version on https://freaktechnik.github.io/jetpack-requestmod