Examine source code of RB Telemetry Coach

{
  "manifest_version": 3,
  "name": "RB Telemetry Coach",
  "version": "0.2.0",
  "description": "Adds local telemetry coaching feedback to Garage 61 analysis pages.",
  "action": {
    "default_title": "RB Telemetry Coach"
  },
  "content_scripts": [
    {
      "matches": [
        "https://garage61.net/*",
        "https://www.garage61.net/*"
      ],
      "js": [
        "pageObserver.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "https://garage61.net/*",
        "https://www.garage61.net/*"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "rb-telemetry-coach@local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}