Examine source code of Tabsy - Tab Finder

{
  "name": "Tabsy - Tab Finder",
  "description": "Tabsy helps you finding the tab you need the most at the moment.",
  "version": "0.1.3resigned1",
  "manifest_version": 2,
  "icons": {
    "16": "assets/icons/icon_16.png",
    "48": "assets/icons/icon_48.png",
    "128": "assets/icons/icon_128.png"
  },
  "browser_action": {
    "default_title": "Open Tab-Search"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lib/jquery.js",
        "lib/jquery.highlight.js",
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "commands": {
    "openSearchbar": {
      "suggested_key": {
        "default": "Alt+Space"
      },
      "description": "Open Searchbar"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "css/style.css",
    "assets/icons/search_icon.svg",
    "http://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css"
  ],
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9bc168d6-88bf-4a81-80c4-56f3090f6a05}"
    }
  }
}