Examine source code of Youtube tab playlist

{
  "manifest_version": 2,
  "name": "Youtube Tab Playlist",
  "description": "Use your tab bar as a playlist!",
  "version": "0.0.7",
  "short_name": "YTP",
  "icons": {
    "16": "/icon/iconB16.png",
    "19": "/icon/iconB19.png",
    "32": "/icon/iconB32.png",
    "38": "/icon/iconB38.png",
    "48": "/icon/iconB48.png",
    "64": "/icon/iconB64.png",
    "128": "/icon/iconB128.png",
    "256": "/icon/iconB256.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "*://*.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "/icon/iconB16.png",
      "19": "/icon/iconB19.png",
      "38": "/icon/iconB38.png"
    },
    "default_title": "Youtube Tab Playlist",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9c61af29-bc79-4c72-a888-95f165346d8a}"
    }
  }
}