Examine source code of The Movie Database

{
  "name": "The Movie Database",
  "description": "This extension will redirect all IMDB links to The Movie Database.",
  "version": "1.3",
  "manifest_version": 2,
  "content_scripts": [
    {
      "run_at": "document_idle",
      "matches": [
        "https://www.google.com/*",
        "https://www.google.pt/*",
        "https://www.google.co.uk/*",
        "https://www.google.co.jp/*",
        "https://www.duckduckgo.com/*",
        "https://duckduckgo.com/*"
      ],
      "js": [
        "replace.js"
      ]
    },
    {
      "run_at": "document_idle",
      "matches": [
        "https://duckduckgo.com/*"
      ],
      "js": [
        "replace_duckduckgo.js"
      ]
    }
  ],
  "permissions": [
    "webRequest",
    "webNavigation",
    "https://api.themoviedb.org/3"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{347e6f2d-3f2f-429d-bc1d-3cb1f31b8ba2}"
    }
  }
}