diff --git a/ui/index.html b/ui/index.html
index b6c66980d5ec..ebb774a7b02b 100644
--- a/ui/index.html
+++ b/ui/index.html
@@ -13,6 +13,10 @@
     <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
     <link rel="manifest" href="/manifest.webmanifest" />
     <script>
+      // Configure Zod before module evaluation so its JIT probe cannot violate strict CSP.
+      globalThis.__zod_globalConfig ??= {};
+      globalThis.__zod_globalConfig.jitless = true;
+
       (function () {
         var THEMES = { claw: 1, knot: 1, dash: 1 };
         var MODES = { system: 1, light: 1, dark: 1 };
diff --git a/ui/src/e2e/csp-jitless.e2e.test.ts b/ui/src/e2e/csp-jitless.e2e.test.ts
index a7fbdada9e07..769223577a65 100644
--- a/ui/src/e2e/csp-jitless.e2e.test.ts
+++ b/ui/src/e2e/csp-jitless.e2e.test.ts
@@ -1,12 +1,12 @@
 // Control UI tests cover startup under the Gateway's strict script policy.
-import { chromium, type Browser } from "playwright";
+import { chromium, firefox, type Browser, type BrowserContext } from "playwright";
 import { afterAll, beforeAll, describe, expect, it } from "vitest";
 import {
   buildControlUiCspHeader,
   computeInlineScriptHashes,
 } from "../../../src/gateway/control-ui-csp.ts";
 import {
-  canRunPlaywrightChromium,
+  canRunPlaywrightChromium as canRunPlaywrightBrowser,
   installMockGateway,
   resolvePlaywrightChromiumExecutablePath,
   startControlUiE2eServer,
@@ -14,11 +14,25 @@ import {
 } from "../test-helpers/control-ui-e2e.ts";
 
 const chromiumExecutablePath = resolvePlaywrightChromiumExecutablePath(chromium.executablePath());
-const chromiumAvailable = canRunPlaywrightChromium(chromiumExecutablePath);
+const chromiumAvailable = canRunPlaywrightBrowser(chromiumExecutablePath);
+const firefoxExecutablePath = firefox.executablePath();
 const allowMissingChromium = process.env.OPENCLAW_UI_E2E_ALLOW_MISSING_CHROMIUM === "1";
 const describeControlUiE2e = chromiumAvailable || !allowMissingChromium ? describe : describe.skip;
 
-let browser: Browser;
+const browsers: Array<{ name: string; launch: () => Promise<Browser> }> = [
+  {
+    name: "Chromium",
+    launch: () => chromium.launch({ executablePath: chromiumExecutablePath }),
+  },
+];
+
+if (canRunPlaywrightBrowser(firefoxExecutablePath)) {
+  browsers.push({
+    name: "Firefox",
+    launch: () => firefox.launch({ executablePath: firefoxExecutablePath }),
+  });
+}
+
 let server: ControlUiE2eServer;
 
 describeControlUiE2e("Control UI strict CSP E2E", () => {
@@ -27,42 +41,43 @@ describeControlUiE2e("Control UI strict CSP E2E", () => {
       throw new Error(`Playwright Chromium is unavailable at ${chromiumExecutablePath}`);
     }
     server = await startControlUiE2eServer();
-    browser = await chromium.launch({ executablePath: chromiumExecutablePath });
   });
 
   afterAll(async () => {
-    await browser?.close();
     await server?.close();
   });
 
-  it("starts without probing eval under the Gateway script policy", async () => {
-    const context = await browser.newContext({ serviceWorkers: "block" });
-    await context.addInitScript(() => {
-      const violations: Array<{ blockedUri: string; effectiveDirective: string }> = [];
-      Object.assign(globalThis, { __openclawCspViolations: violations });
-      document.addEventListener("securitypolicyviolation", (event) => {
-        violations.push({
-          blockedUri: event.blockedURI,
-          effectiveDirective: event.effectiveDirective,
-        });
-      });
-    });
-    const page = await context.newPage();
-    const gateway = await installMockGateway(page);
-    await page.route(server.baseUrl, async (route) => {
-      const response = await route.fetch();
-      const body = await response.text();
-      const csp = buildControlUiCspHeader({
-        inlineScriptHashes: computeInlineScriptHashes(body),
-      });
-      await route.fulfill({
-        body,
-        headers: { ...response.headers(), "content-security-policy": csp },
-        response,
-      });
-    });
+  it.each(browsers)("starts without probing eval in $name", async ({ launch }) => {
+    const browser = await launch();
+    let context: BrowserContext | undefined;
 
     try {
+      context = await browser.newContext({ serviceWorkers: "block" });
+      await context.addInitScript(() => {
+        const violations: Array<{ blockedUri: string; effectiveDirective: string }> = [];
+        Object.assign(globalThis, { __openclawCspViolations: violations });
+        document.addEventListener("securitypolicyviolation", (event) => {
+          violations.push({
+            blockedUri: event.blockedURI,
+            effectiveDirective: event.effectiveDirective,
+          });
+        });
+      });
+      const page = await context.newPage();
+      const gateway = await installMockGateway(page);
+      await page.route(server.baseUrl, async (route) => {
+        const response = await route.fetch();
+        const body = await response.text();
+        const csp = buildControlUiCspHeader({
+          inlineScriptHashes: computeInlineScriptHashes(body),
+        });
+        await route.fulfill({
+          body,
+          headers: { ...response.headers(), "content-security-policy": csp },
+          response,
+        });
+      });
+
       const response = await page.goto(server.baseUrl);
       expect(response?.status()).toBe(200);
       const csp = response?.headers()["content-security-policy"];
@@ -73,24 +88,31 @@ describeControlUiE2e("Control UI strict CSP E2E", () => {
         .locator(".agent-chat__composer-combobox textarea")
         .waitFor({ state: "visible", timeout: 10_000 });
 
-      const evalViolations = await page.evaluate(() => {
-        const violations = (
-          globalThis as typeof globalThis & {
-            __openclawCspViolations?: Array<{
-              blockedUri: string;
-              effectiveDirective: string;
-            }>;
-          }
-        )["__openclawCspViolations"];
-        return (violations ?? []).filter(
-          (violation) =>
-            violation.blockedUri === "eval" &&
-            violation.effectiveDirective.startsWith("script-src"),
-        );
+      const cspState = await page.evaluate(() => {
+        const runtime = globalThis as typeof globalThis & {
+          __openclawCspViolations?: Array<{
+            blockedUri: string;
+            effectiveDirective: string;
+          }>;
+          __zod_globalConfig?: { jitless?: boolean };
+        };
+        return {
+          jitless: runtime["__zod_globalConfig"]?.jitless === true,
+          evalViolations: (runtime["__openclawCspViolations"] ?? []).filter(
+            (violation) =>
+              violation.blockedUri === "eval" &&
+              violation.effectiveDirective.startsWith("script-src"),
+          ),
+        };
       });
-      expect(evalViolations).toEqual([]);
+      expect(cspState.jitless).toBe(true);
+      expect(cspState.evalViolations).toEqual([]);
     } finally {
-      await context.close();
+      try {
+        await context?.close();
+      } finally {
+        await browser.close();
+      }
     }
   });
 });