Examine source code of Twitch Switch

{
  "manifest_version": 3,
  "name": "Twitch Switch",
  "description": "Automatically open, switch, and manage priority Twitch streams.",
  "version": "1.0.1",
  "icons": {
    "16": "icons/logo_16x16.png",
    "48": "icons/logo_48x48.png",
    "128": "icons/logo_128x128.png"
  },
  "action": {
    "default_title": "Twitch Switch",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/index.js"
    ]
  },
  "permissions": [
    "storage",
    "identity",
    "alarms"
  ],
  "host_permissions": [
    "*://*.twitch.tv/*",
    "https://api.twitch.tv/*",
    "https://id.twitch.tv/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "content/index.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "twitch-switch@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "android": {
        "strict_min_version": "142.0"
      }
    }
  }
}