diff --git a/lib/internal/navigator.js b/lib/internal/navigator.js
index 546505e9460103..e56b2da5e339e3 100644
--- a/lib/internal/navigator.js
+++ b/lib/internal/navigator.js
@@ -78,10 +78,10 @@ function getNavigatorPlatform(process) {
 class Navigator {
   // Private properties are used to avoid brand validations.
   #availableParallelism;
-  #userAgent = `Node.js/${StringPrototypeSlice(nodeVersion, 1, StringPrototypeIndexOf(nodeVersion, '.'))}`;
-  #platform = getNavigatorPlatform(process);
-  #language = Intl?.Collator().resolvedOptions().locale || 'en-US';
-  #languages = ObjectFreeze([this.#language]);
+  #userAgent;
+  #platform;
+  #language;
+  #languages;
 
   constructor() {
     if (arguments[0] === kInitialize) {
@@ -102,6 +102,7 @@ class Navigator {
    * @return {string}
    */
   get language() {
+    this.#language ??= Intl?.Collator().resolvedOptions().locale || 'en-US';
     return this.#language;
   }
 
@@ -109,6 +110,7 @@ class Navigator {
    * @return {Array<string>}
    */
   get languages() {
+    this.#languages ??= ObjectFreeze([this.language]);
     return this.#languages;
   }
 
@@ -116,6 +118,7 @@ class Navigator {
    * @return {string}
    */
   get userAgent() {
+    this.#userAgent ??= `Node.js/${StringPrototypeSlice(nodeVersion, 1, StringPrototypeIndexOf(nodeVersion, '.'))}`;
     return this.#userAgent;
   }
 
@@ -123,6 +126,7 @@ class Navigator {
    * @return {string}
    */
   get platform() {
+    this.#platform ??= getNavigatorPlatform(process);
     return this.#platform;
   }
 }