Examine source code of Proxy Toolbar Toggle

{
  "manifest_version": 2,
  "name": "Proxy Toggler",
  "version": "2.3",
  "description": "Route specific tabs or the entire browser through a configurable SOCKS proxy.",
  "permissions": [
    "proxy",
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Toggle Proxy",
    "default_icon": "icons/off.png"
  },
  "icons": {
    "32": "icons/off.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "proxy-toggler@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}