Examine source code of Multi Proxy Switcher

{
  "manifest_version": 3,
  "name": "Multi Proxy Switcher",
  "version": "1.6",
  "description": "Sticky proxy manager with auto-auth for multi-instance browsing, gaming & automation.",
  "permissions": [
    "storage",
    "proxy",
    "tabs",
    "privacy",
    "alarms",
    "webRequest",
    "webRequestAuthProvider"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "multiproxyswitcher@softecpay.com",
      "strict_min_version": "126.0"
    }
  }
}