Examine source code of Technitium DNS Controller

{
  "manifest_version": 2,
  "name": "Technitium DNS Controller",
  "description": "Toggle Technitium DNS Server blocking, run checks, and view status directly from Firefox.",
  "version": "0.1.3",
  "browser_action": {
    "default_title": "Technitium DNS Controller",
    "default_icon": {
      "16": "icons/status-unknown.svg",
      "32": "icons/status-unknown.svg"
    },
    "default_popup": "popup.html"
  },
  "icons": {
    "32": "icons/status-unknown.svg",
    "48": "icons/status-unknown.svg",
    "96": "icons/status-unknown.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{333d54a7-6edd-480e-a683-acbe156b97cd}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "<all_urls>"
  ]
}