Examine source code of Courage Quotes

{
  "manifest_version": 2,
  "name": "Courage Quotes",
  "version": "1.0",
  "description": "Displays a random courage quote each time you click the extension button.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png",
      "96": "icon96.png"
    }
  },
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{59df1063-dee4-4378-9199-c1abea4a05de}"
    }
  }
}