Examine source code of Remove DDG Banners

{
  "manifest_version": 2,
  "name": "Remove DDG Banners",
  "version": "1.0.0",
  "description": "Remove annoying banners from DuckDuckGo",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "cookies",
    "https://duckduckgo.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c725debf-3224-4455-97cc-8459905a06a8}"
    }
  }
}