Examine source code of LiveBarn Enhanced Player

{
  "manifest_version": 2,
  "name": "LiveBarn Enhanced Player",
  "version": "1.0",
  "description": "Adds playback speed control and forward 10s button to LiveBarn video player",
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.livebarn.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icon16.svg",
    "48": "icon48.svg",
    "128": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b7972993-6783-412c-a9d3-7be28fc8affd}"
    }
  }
}