Examine source code of ClickJoy

{
  "manifest_version": 2,
  "name": "ClickJoy",
  "version": "1.0",
  "description": "Rewards your Twitter clicks with positive messages to encourage engagement.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ddabac40-28f8-4e50-9029-03381673a07e}"
    }
  }
}