Examine source code of Social Trends Tracker

{
  "manifest_version": 2,
  "name": "Social Trends Tracker",
  "version": "1.0",
  "description": "See trending topics from social media and the web.",
  "permissions": [
    "https://trends.google.com/*",
    "https://www.reddit.com/*",
    "https://api.twitter.com/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{09ab6ba7-dbee-4464-9757-ede2c7cfc431}"
    }
  }
}