Examine source code of YouTube Customizer

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "version": "1.0.2",
  "developer": {
    "name": "Ryze",
    "url": "https://github.com/ryze312"
  },
  "icons": {
    "16": "icon.svg",
    "32": "icon.svg",
    "64": "icon.svg",
    "128": "icon.svg",
    "256": "icon.svg",
    "512": "icon.svg",
    "1024": "icon.svg"
  },
  "options_ui": {
    "page": "settings/settings.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{841bfda8-83e6-11ee-82a9-4bf1ae962c91}"
    }
  },
  "background": {
    "scripts": [
      "scripts/background/config.js"
    ],
    "type": "module",
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "scripts/content/ytCustomizer.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "permissions": [
    "storage",
    "nativeMessaging"
  ]
}