Examine source code of ZwiftMap for Strava

{
  "name": "ZwiftMap for Strava",
  "description": "Replace real-world maps with Zwift maps when visiting Strava",
  "version": "1.6.0",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "https://www.strava.com/*"
      ],
      "js": [
        "./dist/inject.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "dist/script.js",
    "assets/*"
  ],
  "icons": {
    "16": "assets/logo-16.png",
    "48": "assets/logo-48.png",
    "128": "assets/logo-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{68f3a18b-149a-40e9-9bcb-c67d151e46ff}"
    }
  }
}