Examine source code of No More Him

{
  "manifest_version": 2,
  "name": "No More Him",
  "description": "This extension detects him and replaces his picture with no more him icon.",
  "version": "1.1resigned1",
  "browser_action": {
    "default_icon": "icon_128.png",
    "default_popup": "main.html"
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "content.min.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cb4dc979-ac8e-4c19-8e50-dd1a5ca01059}"
    }
  }
}