Examine source code of Ovipets RGB Extractor

{
  "manifest_version": 3,
  "name": "Ovipets RGB Extractor",
  "version": "4.0.1",
  "description": "Extract, format, and copy RGB color codes from Ovipets pet pages. Select colors, apply custom formats, and calculate differences.",
  "permissions": [
    "activeTab",
    "scripting",
    "clipboardWrite",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hugemouthnana@gmail.com"
    }
  },
  "host_permissions": [
    "https://ovipets.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://ovipets.com/*"
      ],
      "js": [
        "formatter.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  }
}