Examine source code of Floating Panel for YouTube™

{
  "version": "0.1.3resigned1",
  "manifest_version": 2,
  "short_name": "appforyoutube",
  "name": "Floating Panel for YouTube™",
  "web_accessible_resources": [
    "data/icons/*"
  ],
  "background": {
    "page": "lib/chrome/background.html"
  },
  "permissions": [
    "storage",
    "https://*.youtube.com/*"
  ],
  "description": "An easy-to-use and lite App for YouTube.",
  "homepage_url": "http://mybrowseraddon.com/floating-youtube-panel.html",
  "browser_action": {
    "default_icon": "data/icons/32.png",
    "default_title": "Floating Panel for YouTube™"
  },
  "content_scripts": [
    {
      "all_frames": false,
      "run_at": "document_start",
      "js": [
        "data/panel/index.js"
      ],
      "css": [
        "data/panel/index.css"
      ],
      "matches": [
        "*://*.youtube.com/*"
      ]
    }
  ],
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-b6Kwfh5u74ual8@jetpack"
    }
  }
}