Examine source code of Pause YT

{
  "manifest_version": 2,
  "name": "Pause YT",
  "version": "1.1resigned1",
  "description": "Adds a browser action icon to the toolbar. Click the button to pause all currently active YouTube players.",
  "icons": {
    "48": "icons/pause_48.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/pause_32.png",
    "default_title": "Pause YoutTube"
  },
  "background": {
    "scripts": [
      "pause_background_script.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://www.youtube.com/*",
        "https://www.youtube.com/*"
      ],
      "js": [
        "pause_content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cd1a26be-a178-4b81-8fde-1dbfd0f553bd}"
    }
  }
}