Examine source code of Proxy Toggles

{
  "manifest_version": 2,
  "name": "Proxy Toggle",
  "version": "1.0",
  "description": "Quickly switch between direct internet connection and a single proxy server with ease.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "permissions": [
    "proxy",
    "tabs",
    "<all_urls>"
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "91.1.0",
      "id": "{5d340220-3d12-483e-8088-44bf6da10b09}"
    }
  }
}