diff --git a/extensions/browser/src/gateway/browser-request.timeout.test.ts b/extensions/browser/src/gateway/browser-request.timeout.test.ts
index 0714cf0d237..9feedf88d1e 100644
--- a/extensions/browser/src/gateway/browser-request.timeout.test.ts
+++ b/extensions/browser/src/gateway/browser-request.timeout.test.ts
@@ -1,3 +1,4 @@
+import { MAX_TIMER_TIMEOUT_MS } from "openclaw/plugin-sdk/number-runtime";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 
 const {
@@ -75,4 +76,27 @@ describe("browser.request local timeout", () => {
       message: "Error: browser request timed out",
     });
   });
+
+  it("caps timeoutMs before local browser dispatches", async () => {
+    const respond = vi.fn();
+
+    await browserHandlers["browser.request"]({
+      params: {
+        method: "POST",
+        path: "/tabs/open",
+        body: { url: "https://example.com" },
+        timeoutMs: Number.MAX_SAFE_INTEGER,
+      },
+      respond: respond as never,
+      context: {
+        nodeRegistry: { listConnected: () => [] },
+      } as never,
+      client: null,
+      req: { type: "req", id: "req-1", method: "browser.request" },
+      isWebchatConnect: () => false,
+    });
+
+    const [, timeoutMs] = withTimeoutMock.mock.calls.at(-1) ?? [];
+    expect(timeoutMs).toBe(MAX_TIMER_TIMEOUT_MS);
+  });
 });
diff --git a/extensions/browser/src/gateway/browser-request.ts b/extensions/browser/src/gateway/browser-request.ts
index d8c22a6fcc3..b634ffe21f4 100644
--- a/extensions/browser/src/gateway/browser-request.ts
+++ b/extensions/browser/src/gateway/browser-request.ts
@@ -1,4 +1,5 @@
 import crypto from "node:crypto";
+import { clampTimerTimeoutMs } from "openclaw/plugin-sdk/number-runtime";
 import {
   normalizeLowercaseStringOrEmpty,
   normalizeOptionalString,
@@ -139,10 +140,7 @@ export async function handleBrowserGatewayRequest({
   const path = normalizeOptionalString(typed.path) ?? "";
   const query = typed.query && typeof typed.query === "object" ? typed.query : undefined;
   const body = typed.body;
-  const timeoutMs =
-    typeof typed.timeoutMs === "number" && Number.isFinite(typed.timeoutMs)
-      ? Math.max(1, Math.floor(typed.timeoutMs))
-      : undefined;
+  const timeoutMs = clampTimerTimeoutMs(typed.timeoutMs);
 
   if (!methodRaw || !path) {
     respond(
diff --git a/extensions/browser/src/node-host/invoke-browser.test.ts b/extensions/browser/src/node-host/invoke-browser.test.ts
index cffcc0b073a..90c274e22af 100644
--- a/extensions/browser/src/node-host/invoke-browser.test.ts
+++ b/extensions/browser/src/node-host/invoke-browser.test.ts
@@ -1,3 +1,4 @@
+import { MAX_TIMER_TIMEOUT_MS } from "openclaw/plugin-sdk/number-runtime";
 import { beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
 
 const controlServiceMocks = vi.hoisted(() => ({
@@ -452,6 +453,29 @@ describe("runBrowserProxyCommand", () => {
     expect(request.query).toEqual({ profile: "openclaw" });
   });
 
+  it("caps browser proxy command timeout before dispatch", async () => {
+    dispatcherMocks.dispatch.mockResolvedValue({
+      status: 200,
+      body: { ok: true },
+    });
+    const timeoutSpy = vi
+      .spyOn(globalThis, "setTimeout")
+      .mockReturnValue(1 as unknown as ReturnType<typeof setTimeout>);
+
+    try {
+      await runBrowserProxyCommand(
+        JSON.stringify({
+          method: "GET",
+          path: "/snapshot",
+          timeoutMs: Number.MAX_SAFE_INTEGER,
+        }),
+      );
+      expect(timeoutSpy).toHaveBeenCalledWith(expect.any(Function), MAX_TIMER_TIMEOUT_MS);
+    } finally {
+      timeoutSpy.mockRestore();
+    }
+  });
+
   it("rejects persistent profile creation when allowProfiles is empty", async () => {
     await expect(
       runBrowserProxyCommand(
diff --git a/extensions/browser/src/node-host/invoke-browser.ts b/extensions/browser/src/node-host/invoke-browser.ts
index e2a95678176..d4d1c0016ec 100644
--- a/extensions/browser/src/node-host/invoke-browser.ts
+++ b/extensions/browser/src/node-host/invoke-browser.ts
@@ -1,4 +1,5 @@
 import fsPromises from "node:fs/promises";
+import { resolveTimerTimeoutMs } from "openclaw/plugin-sdk/number-runtime";
 import { normalizeStringEntries } from "openclaw/plugin-sdk/string-coerce-runtime";
 import { redactCdpUrl } from "../browser/cdp.helpers.js";
 import { loadBrowserConfigForRuntimeRefresh } from "../browser/config-refresh-source.js";
@@ -136,9 +137,7 @@ function decodeParams<T>(raw?: string | null): T {
 }
 
 function resolveBrowserProxyTimeout(timeoutMs?: number): number {
-  return typeof timeoutMs === "number" && Number.isFinite(timeoutMs)
-    ? Math.max(1, Math.floor(timeoutMs))
-    : DEFAULT_BROWSER_PROXY_TIMEOUT_MS;
+  return resolveTimerTimeoutMs(timeoutMs, DEFAULT_BROWSER_PROXY_TIMEOUT_MS);
 }
 
 function isBrowserProxyTimeoutError(err: unknown): boolean {