Examine source code of Colorizer for PPW

{
  "manifest_version": 3,
  "name": "Colorizer for PPW",
  "version": "2.3",
  "description": "Colorizes the PPW nav bar based on the logged-in user.",
  "browser_specific_settings": {
    "gecko": {
      "id": "colorizer-for-ppw@nicksaris",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "128": "icon.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Colorizer for PPW",
    "default_icon": {
      "128": "icon.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://propertypreswizard.com/control.php/*",
        "https://www.propertypreswizard.com/control.php/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ]
}