Examine source code of NZdial

{
  "manifest_version": 2,
  "name": "NZdial",
  "version": "1.0",
  "description": "A beautiful, privacy-focused Speed Dial for your new tab page.",
  "icons": {
    "16": "icons/logo.svg",
    "32": "icons/logo.svg",
    "48": "icons/logo.svg",
    "64": "icons/logo.svg",
    "96": "icons/logo.svg",
    "128": "icons/logo.svg"
  },
  "chrome_url_overrides": {
    "newtab": "dial.html"
  },
  "permissions": [
    "storage",
    "downloads",
    "tabs",
    "contextMenus",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "speeddial@custom",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}