Examine source code of Steam Analytics Sync

{
  "manifest_version": 3,
  "name": "Steam Analytics Sync",
  "version": "2.0.6",
  "description": "Automatically sync Steam Partner traffic data to your analytics dashboard",
  "browser_specific_settings": {
    "gecko": {
      "id": "steam-analytics-sync@yourdomain.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "alarms",
    "tabs",
    "scripting",
    "cookies"
  ],
  "host_permissions": [
    "https://partner.steamgames.com/*",
    "https://partner.steampowered.com/*"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background/service-worker.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://partner.steamgames.com/*"
      ],
      "js": [
        "content/steam-partner.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://partner.steampowered.com/*"
      ],
      "js": [
        "content/steam-financial.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}