Examine source code of Free Medium For Mobile

{
  "manifest_version": 2,
  "name": "Free Medium For Mobile",
  "version": "1.0",
  "description": "Easy navigation to the freedium.cfd for mobile browser",
  "content_scripts": [
    {
      "matches": [
        "*://*.medium.com/*",
        "*://*.freedium.cfd/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d36f0a95-5fe5-481c-92a4-43b58ad56c0d}"
    }
  }
}