diff --git a/src/auth/login.ts b/src/auth/login.ts
index 879c112..d2a8b04 100644
--- a/src/auth/login.ts
+++ b/src/auth/login.ts
@@ -39,7 +39,6 @@ export interface AuthenticateOptions {
   signal?: AbortSignal;
   promptForEmail?: () => Promise<string | null | undefined>;
   promptForOtp?: (email: string) => Promise<string | null | undefined>;
-  promptForBrowserAuth?: () => Promise<string | null | undefined>;
 }
 
 function normalizeInput(value: string | null | undefined): string | null {
@@ -91,16 +90,6 @@ export async function saveBrowserAuthInput(input: string): Promise<StoredToken>
   return credentials;
 }
 
-async function promptForBrowserCredentials(
-  options: AuthenticateOptions,
-): Promise<StoredToken | null> {
-  const input = normalizeInput(await options.promptForBrowserAuth?.());
-  if (!input) {
-    return null;
-  }
-  return saveBrowserAuthInput(input);
-}
-
 function buildAuthHeaders(includeJsonContentType = false): Record<string, string> {
   return {
     Accept: "application/json",
@@ -297,11 +286,6 @@ export async function authenticate(options: AuthenticateOptions = {}): Promise<S
     normalizeInput(process.env.PI_PERPLEXITY_EMAIL) ??
     normalizeInput(await options.promptForEmail?.());
   if (!email) {
-    const browserCredentials = await promptForBrowserCredentials(options);
-    if (browserCredentials) {
-      return browserCredentials;
-    }
-
     throw new AuthError(
       "NO_TOKEN",
       `Could not find a desktop token, browser token/cookie, or email for OTP fallback. ${DESKTOP_AUTH_HELP} ${OTP_AUTH_HELP} ${BROWSER_AUTH_HELP}`,
@@ -317,13 +301,6 @@ export async function authenticate(options: AuthenticateOptions = {}): Promise<S
       throw error;
     }
 
-    if (error instanceof BrowserChallengeError) {
-      const browserCredentials = await promptForBrowserCredentials(options);
-      if (browserCredentials) {
-        return browserCredentials;
-      }
-    }
-
     throw new AuthError(
       "EXTRACTION_FAILED",
       `Email OTP authentication failed: ${errorMessage(error)}. ${OTP_AUTH_HELP} ${BROWSER_AUTH_HELP}`,
diff --git a/src/commands/login.ts b/src/commands/login.ts
index 577c13b..4e706d1 100644
--- a/src/commands/login.ts
+++ b/src/commands/login.ts
@@ -107,7 +107,7 @@ export function registerPerplexityCommands(pi: ExtensionAPI): void {
           return;
         }
 
-        await authenticate({ promptForEmail, promptForOtp, promptForBrowserAuth });
+        await authenticate({ promptForEmail, promptForOtp });
         ctx.ui.notify("Perplexity login successful. Token saved.", "info");
       } catch (error) {
         if (error instanceof AuthError && error.code === "NO_TOKEN") {
diff --git a/src/index.ts b/src/index.ts
index aeb5924..f77dd46 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -5,7 +5,6 @@ import { Type } from "@sinclair/typebox";
 import { registerPerplexityConfigCommand } from "./commands/config.js";
 import { registerPerplexityCommands } from "./commands/login.js";
 
-import { browserLoginInstructions } from "./auth/browser.js";
 import { authenticate } from "./auth/login.js";
 import { loadConfig, resolveSearchDefaults } from "./config.js";
 import { formatForLLM } from "./search/format.js";
@@ -58,13 +57,6 @@ export default function (pi: ExtensionAPI) {
           ...(signal !== undefined ? { signal } : {}),
           promptForEmail: async () => promptInput("Perplexity email", "you@example.com"),
           promptForOtp: async (email) => promptInput(`Enter OTP sent to ${email}`, "123456"),
-          promptForBrowserAuth: async () => {
-            ctx?.ui?.notify?.(browserLoginInstructions(), "info");
-            return promptInput(
-              "Paste copied cURL command or Cookie header",
-              "curl 'https://www.perplexity.ai/' -H 'Cookie: ...'",
-            );
-          },
         });
 
         if (signal?.aborted) {
diff --git a/test/auth/login.test.ts b/test/auth/login.test.ts
index e38ac2c..341443c 100644
--- a/test/auth/login.test.ts
+++ b/test/auth/login.test.ts
@@ -442,35 +442,6 @@ describe("auth/login", () => {
     expect(saveTokenMock).toHaveBeenCalledTimes(0);
   });
 
-  test("authenticate falls back to browser auth when OTP CSRF hits Cloudflare", async () => {
-    process.env.PI_AUTH_NO_BORROW = "1";
-    const browserToken = createJwt(Date.now() + 2 * 60 * 60 * 1000);
-
-    const loadTokenMock = mock(async () => null);
-    const saveTokenMock = mock(async (_token: StoredToken) => undefined);
-    const clearTokenMock = mock(async () => undefined);
-
-    mock.module("../../src/auth/storage.js", () => ({
-      loadToken: loadTokenMock,
-      saveToken: saveTokenMock,
-      clearToken: clearTokenMock,
-    }));
-
-    const fetchMock = mock(async () =>
-      new Response("<!DOCTYPE html><title>Just a moment...</title>", { status: 403 }),
-    );
-    globalThis.fetch = fetchMock as unknown as typeof fetch;
-
-    const { authenticate } = await importLoginModule();
-
-    const token = await authenticate({
-      promptForEmail: async () => "user@example.com",
-      promptForBrowserAuth: async () => `__Secure-next-auth.session-token=${browserToken}; cf_clearance=ok`,
-    });
-
-    expect(token.cookies).toContain("cf_clearance=ok");
-    expect(saveTokenMock).toHaveBeenCalledTimes(1);
-  });
   test("authenticate throws NO_TOKEN when no cached token and no OTP email input", async () => {
     process.env.PI_AUTH_NO_BORROW = "1";