diff --git a/extensions/browser/src/browser/chrome-mcp.test.ts b/extensions/browser/src/browser/chrome-mcp.test.ts
index 221b15cac14..33f2dcd993d 100644
--- a/extensions/browser/src/browser/chrome-mcp.test.ts
+++ b/extensions/browser/src/browser/chrome-mcp.test.ts
@@ -1,6 +1,7 @@
 import fs from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
+import { MAX_TIMER_TIMEOUT_MS } from "openclaw/plugin-sdk/number-runtime";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import {
   clickChromeMcpCoords,
@@ -12,6 +13,7 @@ import {
   listChromeMcpTabs,
   navigateChromeMcpPage,
   openChromeMcpTab,
+  resolveChromeMcpNavigateCallTimeoutMs,
   resetChromeMcpSessionsForTest,
   setChromeMcpProcessCleanupDepsForTest,
   setChromeMcpSessionFactoryForTest,
@@ -922,6 +924,11 @@ describe("chrome MCP page parsing", () => {
     expect(navigateCall?.arguments?.timeout).toBe(20_000);
   });
 
+  it("caps the navigate_page safety-net timeout", () => {
+    expect(resolveChromeMcpNavigateCallTimeoutMs(10_000)).toBe(15_000);
+    expect(resolveChromeMcpNavigateCallTimeoutMs(Number.MAX_VALUE)).toBe(MAX_TIMER_TIMEOUT_MS);
+  });
+
   it("resets the Chrome MCP session when a navigate_page call hangs past the safety-net timeout", async () => {
     vi.useFakeTimers();
     let factoryCalls = 0;
diff --git a/extensions/browser/src/browser/chrome-mcp.ts b/extensions/browser/src/browser/chrome-mcp.ts
index c4ef348e907..09a63054d5c 100644
--- a/extensions/browser/src/browser/chrome-mcp.ts
+++ b/extensions/browser/src/browser/chrome-mcp.ts
@@ -8,6 +8,7 @@ import { promisify } from "node:util";
 import { Client } from "@modelcontextprotocol/sdk/client/index.js";
 import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js";
 import {
+  addTimerTimeoutGraceMs,
   parseStrictPositiveInteger,
   resolveNonNegativeIntegerOption,
 } from "openclaw/plugin-sdk/number-runtime";
@@ -1213,6 +1214,7 @@ export async function navigateChromeMcpPage(params: {
   timeoutMs?: number;
 }): Promise<{ url: string }> {
   const resolvedTimeoutMs = params.timeoutMs ?? CHROME_MCP_NAVIGATE_TIMEOUT_MS;
+  const callTimeoutMs = resolveChromeMcpNavigateCallTimeoutMs(resolvedTimeoutMs);
   await callTool(
     params.profileName,
     chromeMcpProfileOptionsFromParams(params),
@@ -1223,7 +1225,7 @@ export async function navigateChromeMcpPage(params: {
       url: params.url,
       timeout: resolvedTimeoutMs,
     },
-    { timeoutMs: resolvedTimeoutMs + 5_000 },
+    { timeoutMs: callTimeoutMs },
   );
   const page = await findPageById(
     params.profileName,
@@ -1233,6 +1235,10 @@ export async function navigateChromeMcpPage(params: {
   return { url: page.url ?? params.url };
 }
 
+export function resolveChromeMcpNavigateCallTimeoutMs(timeoutMs: number): number {
+  return addTimerTimeoutGraceMs(timeoutMs) ?? 1;
+}
+
 export async function takeChromeMcpSnapshot(params: {
   profileName: string;
   profile?: ChromeMcpProfileOptions;