Examine source code of Connections Companion

{
  "manifest_version": 3,
  "name": "Connections Companion",
  "version": "0.1.6",
  "description": "Plan your NYT Connections groups, assign colors, and auto-submit in reverse rainbow order. Pauses on any miss to save your guesses.",
  "browser_specific_settings": {
    "gecko": {
      "id": "connections-companion@jamescary.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "64": "images/icon-64.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128.png",
    "256": "images/icon-256.png",
    "512": "images/icon-512.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.nytimes.com/games/connections*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ]
}