diff --git a/extensions/browser/src/browser/server-context.loopback-direct-ws.test.ts b/extensions/browser/src/browser/server-context.loopback-direct-ws.test.ts
index 22a3b69711d..210e519da84 100644
--- a/extensions/browser/src/browser/server-context.loopback-direct-ws.test.ts
+++ b/extensions/browser/src/browser/server-context.loopback-direct-ws.test.ts
@@ -1,5 +1,5 @@
 import { afterEach, describe, expect, it, vi } from "vitest";
-import { withFetchPreconnect } from "../../test-support.js";
+import { withBrowserFetchPreconnect } from "../../test-fetch.js";
 import * as cdpModule from "./cdp.js";
 import { BrowserCdpEndpointBlockedError } from "./errors.js";
 import { createBrowserRouteContext } from "./server-context.js";
@@ -33,7 +33,7 @@ describe("browser server-context loopback direct WebSocket profiles", () => {
       } as unknown as Response;
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     state.resolved.ssrfPolicy = {};
     state.resolved.profiles.openclaw = {
@@ -78,7 +78,7 @@ describe("browser server-context loopback direct WebSocket profiles", () => {
       throw new Error(`unexpected fetch: ${u}`);
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     state.resolved.ssrfPolicy = {};
     state.resolved.profiles.openclaw = {
@@ -127,7 +127,7 @@ describe("browser server-context loopback direct WebSocket profiles", () => {
       throw new Error(`unexpected fetch: ${u}`);
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     state.resolved.profiles.openclaw = {
       cdpUrl: "wss://127.0.0.1:18800/cdp?token=abc",
@@ -148,7 +148,7 @@ describe("browser server-context loopback direct WebSocket profiles", () => {
       throw new Error("unexpected fetch");
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     state.resolved.ssrfPolicy = {
       dangerouslyAllowPrivateNetwork: false,
diff --git a/extensions/browser/src/browser/server-context.remote-tab-ops.harness.ts b/extensions/browser/src/browser/server-context.remote-tab-ops.harness.ts
index 824f122f34a..6d339a9db3f 100644
--- a/extensions/browser/src/browser/server-context.remote-tab-ops.harness.ts
+++ b/extensions/browser/src/browser/server-context.remote-tab-ops.harness.ts
@@ -1,5 +1,5 @@
 import { vi } from "vitest";
-import { withFetchPreconnect } from "../../test-support.js";
+import { withBrowserFetchPreconnect } from "../../test-fetch.js";
 import type { BrowserServerState } from "./server-context.js";
 import { createBrowserRouteContext } from "./server-context.js";
 
@@ -50,7 +50,7 @@ export function makeUnexpectedFetchMock() {
 
 export function createRemoteRouteHarness(fetchMock?: (url: unknown) => Promise<Response>) {
   const activeFetchMock = fetchMock ?? makeUnexpectedFetchMock();
-  global.fetch = withFetchPreconnect(activeFetchMock);
+  global.fetch = withBrowserFetchPreconnect(activeFetchMock);
   const state = makeState("remote");
   const ctx = createBrowserRouteContext({ getState: () => state });
   return { state, remote: ctx.forProfile("remote"), fetchMock: activeFetchMock };
diff --git a/extensions/browser/src/browser/server-context.tab-selection-state.test.ts b/extensions/browser/src/browser/server-context.tab-selection-state.test.ts
index 03354909abf..953360c6733 100644
--- a/extensions/browser/src/browser/server-context.tab-selection-state.test.ts
+++ b/extensions/browser/src/browser/server-context.tab-selection-state.test.ts
@@ -1,5 +1,5 @@
 import { afterEach, describe, expect, it, vi } from "vitest";
-import { withFetchPreconnect } from "../../test-support.js";
+import { withBrowserFetchPreconnect } from "../../test-fetch.js";
 
 vi.hoisted(() => {
   vi.resetModules();
@@ -82,7 +82,7 @@ async function openManagedTabWithRunningProfile(params: {
   fetchMock: ReturnType<typeof vi.fn>;
   url?: string;
 }) {
-  global.fetch = withFetchPreconnect(params.fetchMock);
+  global.fetch = withBrowserFetchPreconnect(params.fetchMock);
   const state = makeState("openclaw");
   seedRunningProfileState(state);
   const ctx = createBrowserRouteContext({ getState: () => state });
@@ -115,7 +115,7 @@ describe("browser server-context tab selection state", () => {
       } as unknown as Response;
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     const ctx = createBrowserRouteContext({ getState: () => state });
     const openclaw = ctx.forProfile("openclaw");
@@ -159,7 +159,7 @@ describe("browser server-context tab selection state", () => {
       } as unknown as Response;
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     state.resolved.ssrfPolicy = {};
     const ctx = createBrowserRouteContext({ getState: () => state });
@@ -225,7 +225,7 @@ describe("browser server-context tab selection state", () => {
       throw new Error(`unexpected fetch: ${value}`);
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     seedRunningProfileState(state);
     const ctx = createBrowserRouteContext({ getState: () => state });
@@ -245,7 +245,7 @@ describe("browser server-context tab selection state", () => {
       },
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     state.resolved.attachOnly = true;
     const ctx = createBrowserRouteContext({ getState: () => state });
@@ -287,7 +287,7 @@ describe("browser server-context tab selection state", () => {
       throw new Error("unexpected fetch");
     });
 
-    global.fetch = withFetchPreconnect(fetchMock);
+    global.fetch = withBrowserFetchPreconnect(fetchMock);
     const state = makeState("openclaw");
     const ctx = createBrowserRouteContext({ getState: () => state });
     const openclaw = ctx.forProfile("openclaw");
diff --git a/extensions/browser/test-fetch.ts b/extensions/browser/test-fetch.ts
new file mode 100644
index 00000000000..b8926a65502
--- /dev/null
+++ b/extensions/browser/test-fetch.ts
@@ -0,0 +1,22 @@
+type FetchPreconnectOptions = {
+  dns?: boolean;
+  tcp?: boolean;
+  http?: boolean;
+  https?: boolean;
+};
+
+type FetchWithPreconnect = {
+  preconnect: (url: string | URL, options?: FetchPreconnectOptions) => void;
+  __openclawAcceptsDispatcher: true;
+};
+
+export function withBrowserFetchPreconnect<T extends typeof fetch>(fn: T): T & FetchWithPreconnect;
+export function withBrowserFetchPreconnect<T extends object>(
+  fn: T,
+): T & FetchWithPreconnect & typeof fetch;
+export function withBrowserFetchPreconnect(fn: object) {
+  return Object.assign(fn, {
+    preconnect: (_url: string | URL, _options?: FetchPreconnectOptions) => {},
+    __openclawAcceptsDispatcher: true as const,
+  });
+}