Examine source code of User-Agent Switcher

{
  "version": "0.3.3",
  "manifest_version": 3,
  "name": "User-Agent Switcher",
  "host_permissions": [
    "*://*/*"
  ],
  "homepage_url": "https://mybrowseraddon.com/useragent-switcher.html",
  "description": "Switch between popular useragent strings from toolbar popup!",
  "permissions": [
    "storage",
    "scripting",
    "declarativeNetRequest"
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "109.0",
      "id": "{75afe46a-7a50-4c6b-b866-c43a1075b071}"
    }
  },
  "background": {
    "scripts": [
      "lib/config.js",
      "lib/chrome.js",
      "lib/runtime.js",
      "lib/netrequest.js",
      "lib/common.js"
    ]
  },
  "commands": {
    "toggle-default-mode": {
      "description": "Toggle default useragent",
      "suggested_key": {
        "mac": "Command+Shift+D",
        "default": "Ctrl+Shift+D"
      }
    }
  },
  "action": {
    "default_title": "User-Agent Switcher",
    "default_popup": "data/popup/popup.html",
    "default_icon": {
      "16": "data/icons/16.png",
      "32": "data/icons/32.png",
      "48": "data/icons/48.png",
      "64": "data/icons/64.png"
    }
  },
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  }
}