Examine source code of CommandMate

{
  "manifest_version": 3,
  "name": "CommandMate",
  "version": "1.2.0",
  "description": "Insert and manage Twitch chat commands with a custom command menu.",
  "host_permissions": [
    "https://www.twitch.tv/*",
    "https://nugrunonly.com/*"
  ],
  "permissions": [],
  "content_scripts": [
    {
      "matches": [
        "https://www.twitch.tv/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "injected.js"
      ],
      "matches": [
        "https://www.twitch.tv/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "com.nugrunonly.commandmate@example.com",
      "strict_min_version": "91.0"
    }
  }
}