Examine source code of Strava Unit Converter

{
  "name": "Strava Unit Converter",
  "description": "This allows you to view both units on your strava feed.",
  "manifest_version": 3,
  "version": "1.1.4",
  "content_scripts": [
    {
      "matches": [
        "*://*.strava.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "converter.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "strava-unit-converter@raymond"
    }
  }
}