Examine source code of YouTabs

{
  "manifest_version": 2,
  "name": "YouTabs",
  "short_name": "YouTabs",
  "author": "Jiri Kuba",
  "description": "This extension is search bar for searching guitar tabs on 911tabs. On supported sites extension will prefill song name for search.",
  "version": "1.6resigned1",
  "icons": {
    "19": "images/icon-19.png",
    "38": "images/icon-38.png",
    "128": "images/icon-128.png"
  },
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js",
        "youtube.content.js"
      ]
    },
    {
      "matches": [
        "*://*.imdb.com/*"
      ],
      "js": [
        "content.js",
        "imdb.content.js"
      ]
    },
    {
      "matches": [
        "*://*.csfd.cz/*"
      ],
      "js": [
        "content.js",
        "csfd.content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "19": "images/icon-19.png",
      "38": "images/icon-38.png",
      "128": "images/icon-128.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{329aa004-5eea-415f-8c6b-d5c54f595322}"
    }
  }
}