Examine source code of Trending Keyword Tracker

{
  "manifest_version": 2,
  "name": "Trending Keyword Tracker",
  "version": "1.1",
  "description": "Track and display trending keywords from the current website.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "icons": {
    "64": "icons/logo_64.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/logo_64.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{128bb9de-f753-4dd7-9687-814339046eb1}"
    }
  }
}