Examine source code of YouTube Speed Controls

{
  "manifest_version": 2,
  "name": "YouTube Speed Controls",
  "version": "1.8",
  "description": "Provides in-browser fullscreen and on-page playback speed controls for YouTube.",
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "icon_fullscreen.png",
    "1x.png",
    "1.5x.png",
    "2x.png",
    "2.5x.png",
    "3x.png",
    "3.5x.png",
    "4x.png",
    "refresh.png",
    "coffee.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-enhanced-controls@iVideoGameBoss.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}