Examine source code of Quick Proxy Toggle

{
  "manifest_version": 2,
  "name": "Quick Proxy Toggle",
  "version": "1.2",
  "description": "Proxy Toggle alternative that toggles between your normal proxy settings and no proxy. Supports PAC URL!",
  "developer": {
    "name": "Delan Azabani",
    "url": "https://www.azabani.com"
  },
  "permissions": [
    "proxy"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "network-wired.svg"
  },
  "browser_action": {
    "default_icon": "network-wired.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "91.1.0",
      "id": "togpac.firefox.addon@azabani.com"
    }
  }
}