Examine source code of Request Assistant

{
  "description": "Currently logs all URLs accessed by the app (into app console & into standard output stream (using dump()), whether the request is explicitly made by the user or automatically made by the app itself.",
  "manifest_version": 2,
  "name": "request-assistant",
  "version": "0.4resigned1",
  "homepage_url": "https://addons.mozilla.org/en-US/firefox/addon/request-assistant/",
  "permissions": [
    "webRequest",
    "*://*/*"
  ],
  "applications": {
    "gecko": {
      "id": "{a081ef40-2320-4c74-98b9-a17cd7027237}",
      "strict_min_version": "57.0a1"
    }
  },
  "background": {
    "scripts": [
      "components/RequestAssistant.js"
    ]
  }
}