Examine source code of Twitch Vertical Toggle

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "0.1.0",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/*",
        "https://m.twitch.tv/*",
        "https://player.twitch.tv/*"
      ],
      "js": [
        "src/page/gql-interceptor.js"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "world": "MAIN"
    },
    {
      "matches": [
        "https://www.twitch.tv/*",
        "https://m.twitch.tv/*",
        "https://player.twitch.tv/*"
      ],
      "js": [
        "src/content/toggle-button.js"
      ],
      "css": [
        "src/content/toggle-button.css"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "world": "ISOLATED"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ttv-vertical-toggle@local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}