Examine source code of YouTube Pauser

{
  "manifest_version": 2,
  "name": "YouTube Pauser",
  "version": "0.2.2resigned1",
  "description": "Single click the icon to play/pause the leftmost YouTube tab, double click to skip. The icon shows elapsed time and video length.",
  "author": "Matthew Zirbel",
  "permissions": [
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5be9b9df-c6df-4605-89f2-492981239525}"
    }
  }
}