Examine source code of Twitch Popout Chat

{
  "manifest_version": 2,
  "name": "Twitch Popout Chat",
  "description": "Popout Twitch chat when a live tab is open",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "TwitchPopoutChat@DUN.dev",
      "strict_min_version": "112.0"
    }
  },
  "icons": {
    "32": "assets/main-32.png",
    "48": "assets/main-48.png",
    "96": "assets/main-96.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "32": "assets/main-32.png",
      "48": "assets/main-48.png",
      "96": "assets/main-96.png"
    },
    "default_title": "Popout Twitch Chat"
  },
  "permissions": [
    "tabs"
  ]
}