Examine source code of TabNews Google Search

{
  "name": "TabNews Google Search",
  "description": "A simple search for the TabNews",
  "version": "0.0.1",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": "icon48.png"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "commands": {
    "toggle-feature": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "MacCtrl+Shift+P"
      },
      "description": "Open index.html"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7f8c4709-1e72-4c7e-ac8f-b9c41df85b61}"
    }
  }
}