Examine source code of UTM Link Generator

{
  "manifest_version": 2,
  "name": "UTM Link Generator",
  "version": "1.1.0",
  "description": "Generate UTM links with source, medium, campaign, term & content params. Custom fields, history, multi-language.",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "utm-link-generator@example.com"
    }
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "24": "images/icon24.png",
      "32": "images/icon32.png",
      "64": "images/icon64.png",
      "128": "images/icon128.png"
    }
  },
  "data_collection_permissions": {
    "usage_statistics": false,
    "crash_reports": false,
    "personalized_ads": false
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "<all_urls>"
  ],
  "icons": {
    "16": "images/icon16.png",
    "24": "images/icon24.png",
    "32": "images/icon32.png",
    "64": "images/icon64.png",
    "128": "images/icon128.png"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}