From 0cf1dc0f55779e83ce9d6ff956be9913efcea844 Mon Sep 17 00:00:00 2001
From: thePR0M3TH3AN <53631862+PR0M3TH3AN@users.noreply.github.com>
Date: Sat, 21 Feb 2026 20:45:47 -0500
Subject: [PATCH] improved playright integration

---
 .github/workflows/ci.yml                      |  48 +++
 AGENTS.md                                     |  18 +
 README.md                                     |  14 +-
 components/profile-modal.html                 |  14 +-
 ...-integration-recommendations-2026-02-22.md |  63 ++++
 js/testHarness.js                             | 313 +++++++++++++++++-
 .../ProfileBlockListController.js             |   4 +
 js/userBlocks.js                              |  54 +--
 package.json                                  |   6 +-
 playwright.config.ts                          |  57 +++-
 .../playwright/run-extension-persistent.mjs   |  49 +++
 .../helpers/persistentExtensionFixture.ts     |  88 +++++
 .../nip07-extension.smoke.spec.ts             |  34 ++
 tests/e2e/agent-testability.spec.ts           |  66 +++-
 tests/e2e/helpers/bitvidTestFixture.ts        | 102 ++++++
 .../e2e/profile-list-sync-diagnostics.spec.ts | 185 +++++++++++
 tests/user-blocks.test.mjs                    | 107 ++++++
 17 files changed, 1165 insertions(+), 57 deletions(-)
 create mode 100644 docs/testing/playwright-integration-recommendations-2026-02-22.md
 create mode 100644 scripts/playwright/run-extension-persistent.mjs
 create mode 100644 tests/e2e-extension/helpers/persistentExtensionFixture.ts
 create mode 100644 tests/e2e-extension/nip07-extension.smoke.spec.ts
 create mode 100644 tests/e2e/profile-list-sync-diagnostics.spec.ts

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d8eb99fb..afcbe295 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -352,6 +352,54 @@ jobs:
       - name: Run DM unit tests
         run: npm run test:dm:unit
 
+  e2e-tests:
+    runs-on: ubuntu-latest
+    timeout-minutes: 35
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: [22]
+        project: [e2e, e2e-firefox]
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Cache npm directory
+        uses: actions/cache@v4
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ matrix.node-version }}-npm-${{ hashFiles('package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-${{ matrix.node-version }}-npm-
+
+      - name: Cache node_modules
+        id: node-modules-cache
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-node-${{ matrix.node-version }}-modules-${{ hashFiles('package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-${{ matrix.node-version }}-modules-
+
+      - name: Install dependencies
+        if: steps.node-modules-cache.outputs.cache-hit != 'true'
+        run: npm ci
+
+      - name: Build app
+        run: npm run build
+
+      - name: Install Playwright browsers
+        run: npx playwright install --with-deps chromium firefox
+
+      - name: Run deterministic E2E suite (${{ matrix.project }})
+        run: npx playwright test tests/e2e --project=${{ matrix.project }}
+
   dm-integration-tests:
     runs-on: ubuntu-latest
     timeout-minutes: 30
diff --git a/AGENTS.md b/AGENTS.md
index 7db688cb..f75a0f61 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -366,6 +366,11 @@ Or set `localStorage.__bitvidTestRelays__` to a JSON array of relay URLs.
 | `waitForSelector(sel, ms)` | `Promise<true>` | Wait for a DOM element |
 | `getRelayHealth()` | `{ relays, unreachable, backoff }` | Relay connection status |
 | `applyRelayOverrides(urls)` | `boolean` | Redirect relay connections |
+| `setTestRelays(urls)` | `{ ok, relays }` | Align relayManager + nostrClient to a deterministic relay set |
+| `setSignerDecryptBehavior(mode, opts?)` | `{ ok, mode, ... }` | Force decrypt behavior (`passthrough`, `timeout`, `error`, `delay`) for signer-based list sync tests |
+| `getListSyncEvents()` | `Array<{ source, at, detail }>` | Read captured sync timeline (`bitvid:auth-loading-state` + `userBlocks` status) |
+| `clearListSyncEvents()` | `void` | Reset captured sync events between assertions |
+| `waitForListSyncEvent(criteria, ms?)` | `Promise<Event>` | Wait for sync milestones (`status`, `reason`, `source`) |
 | `nostrClient` | `NostrClient` | Direct access for advanced use |
 
 ### Mock Relay (`scripts/agent/simple-relay.mjs`)
@@ -406,6 +411,9 @@ test("agent can seed and view videos", async ({ page, gotoApp, loginAs, seedEven
 | `clearRelay()` | `() => Promise` | Wipe all relay events |
 | `gotoApp(path?)` | `(string?) => Promise` | Navigate with test mode + relay overrides |
 | `loginAs(page)` | `(Page) => Promise<string>` | Login with deterministic test key |
+| `setTestRelays(page, relays)` | `(Page, string[]) => Promise<{ok, relays}>` | Force relay alignment through harness + relayManager |
+| `setDecryptBehavior(page, mode, opts?)` | `(Page, mode, opts?) => Promise` | Force signer decrypt behavior (`passthrough`, `timeout`, `error`, `delay`) |
+| `startDiagnostics(page, opts?)` | `(Page, opts?) => Promise<{stop()}>` | Capture console/page errors and list-sync telemetry for assertions |
 | `testPubkey` | `string` | Hex pubkey of the test key |
 | `relayUrl` | `string` | WebSocket URL of the mock relay |
 
@@ -418,6 +426,8 @@ Use these for stable element targeting:
 | `[data-testid="login-button"]` | Header login button |
 | `[data-testid="upload-button"]` | Header upload button (hidden until logged in) |
 | `[data-testid="profile-button"]` | Header profile button (hidden until logged in) |
+| `[data-testid="profile-permission-prompt"]` | Profile list-sync permission CTA container |
+| `[data-testid="profile-permission-prompt-button"]` | Profile list-sync permission/retry CTA button |
 | `[data-testid="search-input"]` | Header search field |
 | `[data-testid="login-modal"]` | Login modal container |
 | `[data-testid="login-provider-button"]` | Login provider option buttons |
@@ -428,6 +438,12 @@ Use these for stable element targeting:
 | `[data-testid="upload-url"]` | Video URL input |
 | `[data-testid="upload-magnet"]` | Magnet link input |
 | `[data-testid="upload-submit"]` | Publish button |
+| `[data-testid="hashtags-sync-status"]` | Profile hashtag sync status message |
+| `[data-testid="subscriptions-sync-status"]` | Profile subscriptions sync status message |
+| `[data-testid="blocked-refresh-button"]` | Profile blocked creators refresh button |
+| `[data-testid="blocked-sync-status"]` | Profile blocked creators sync status message |
+| `[data-testid="blocked-list"]` | Blocked creators list container |
+| `[data-testid="blocked-empty-state"]` | Blocked creators empty state |
 | `[data-testid="video-modal"]` | Video player modal |
 | `[data-testid="video-card"]` | Individual video card in the feed |
 | `[data-testid="video-list"]` | Video feed grid container |
@@ -440,6 +456,8 @@ Use these for stable element targeting:
 | `scripts/agent/simple-relay.mjs` | Mock relay with HTTP seeding API |
 | `tests/e2e/helpers/bitvidTestFixture.ts` | Reusable Playwright fixture |
 | `tests/e2e/agent-testability.spec.ts` | Infrastructure validation tests |
+| `scripts/playwright/run-extension-persistent.mjs` | Dedicated persistent-context launcher for extension smoke tests |
+| `docs/testing/playwright-integration-recommendations-2026-02-22.md` | Playwright/extension integration recommendations and follow-ups |
 
 ---
 
diff --git a/README.md b/README.md
index 4aa69277..659ab279 100644
--- a/README.md
+++ b/README.md
@@ -213,7 +213,13 @@ For detailed architecture and system documentation, see the [Documentation Index
 - **Run load tests**: `npm run test:load`
 - **Run DM unit tests**: `npm run test:dm:unit`
 - **Run DM integration tests**: `npm run test:dm:integration`
-- **Run headless E2E tests**: `npm run test:e2e`
+- **Run headless E2E tests (Chromium + Firefox)**: `npm run test:e2e`
+- **Run E2E tests (Chromium only)**: `npm run test:e2e:chromium`
+- **Run E2E tests (Firefox only)**: `npm run test:e2e:firefox`
+- **Run deterministic E2E matrix**: `npm run test:e2e:deterministic`
+- **Run NIP-07 extension smoke (opt-in)**: `PLAYWRIGHT_EXTENSION_PATH=/abs/path/to/extension npm run test:e2e:extension`
+  - Uses persistent-context launcher: `scripts/playwright/run-extension-persistent.mjs`
+  - Optional profile dir: `PLAYWRIGHT_EXTENSION_USER_DATA_DIR=/abs/path/to/profile`
 - **Run visual regression tests**: `npm run test:visual`
 - **Update visual baselines**: `npm run test:visual:update`
 - **Run design system audit**: `npm run audit` (Generates remediation report)
@@ -572,7 +578,11 @@ Before pushing, run `npm run build` locally so the Tailwind bundle regenerates.
 
 - **Direct Messages**: Run `npm run test:dm:unit` and `npm run test:dm:integration` for DM flows.
 
-- **End-to-End**: Run `npm run test:e2e` for headless Playwright journeys.
+- **End-to-End**:
+  - `npm run test:e2e` runs deterministic Playwright journeys on Chromium + Firefox.
+  - `npm run test:e2e:chromium` / `npm run test:e2e:firefox` runs a single browser target.
+  - `npm run test:e2e:extension` runs the opt-in Chromium extension suite (set `PLAYWRIGHT_EXTENSION_PATH` and optionally `PLAYWRIGHT_ENABLE_EXTENSION_E2E=1`).
+  - Recommendations/roadmap: `docs/testing/playwright-integration-recommendations-2026-02-22.md`
 
 ### Manual QA checklist
 
diff --git a/components/profile-modal.html b/components/profile-modal.html
index 4ecaef64..869f127a 100644
--- a/components/profile-modal.html
+++ b/components/profile-modal.html
@@ -383,16 +383,19 @@
           >
             <div
               id="profilePermissionPrompt"
+              data-testid="profile-permission-prompt"
               class="card hidden flex flex-col gap-3 p-4 sm:flex-row sm:items-center sm:justify-between"
               role="status"
               aria-live="polite"
             >
               <p
                 id="profilePermissionPromptMessage"
+                data-testid="profile-permission-prompt-message"
                 class="text-sm text-muted"
               ></p>
               <button
                 id="profilePermissionPromptButton"
+                data-testid="profile-permission-prompt-button"
                 type="button"
                 class="btn focus-ring"
               >
@@ -927,6 +930,7 @@
                 </p>
                 <p
                   id="profileHashtagStatus"
+                  data-testid="hashtags-sync-status"
                   class="text-sm text-muted"
                   role="status"
                   aria-live="polite"
@@ -1053,6 +1057,7 @@
               </p>
               <p
                 id="subscriptionsStatus"
+                data-testid="subscriptions-sync-status"
                 class="text-sm text-muted"
                 role="status"
                 aria-live="polite"
@@ -1339,6 +1344,7 @@
                 <h3 class="text-base font-semibold text-text">Blocked creators</h3>
                 <button
                   id="blockedRefreshBtn"
+                  data-testid="blocked-refresh-button"
                   type="button"
                   class="btn-ghost btn-icon"
                   data-size="sm"
@@ -1369,11 +1375,17 @@
               </div>
               <div
                 id="blockedEmpty"
+                data-testid="blocked-empty-state"
                 class="card border border-dashed border-border/60 p-6 text-center text-sm text-muted"
               >
                 You haven’t blocked any creators yet.
               </div>
-              <ul id="blockedList" class="grid-stack" data-orientation="vertical"></ul>
+              <ul
+                id="blockedList"
+                data-testid="blocked-list"
+                class="grid-stack"
+                data-orientation="vertical"
+              ></ul>
             </section>
             <section
               id="profilePaneMessages"
diff --git a/docs/testing/playwright-integration-recommendations-2026-02-22.md b/docs/testing/playwright-integration-recommendations-2026-02-22.md
new file mode 100644
index 00000000..332c948b
--- /dev/null
+++ b/docs/testing/playwright-integration-recommendations-2026-02-22.md
@@ -0,0 +1,63 @@
+# Playwright Integration Recommendations (2026-02-22)
+
+This document captures practical follow-ups for improving bitvid's end-to-end and extension integration testing.
+
+## What is now in place
+
+1. Deterministic E2E matrix projects:
+- Chromium (`e2e`)
+- Firefox (`e2e-firefox`)
+
+2. Optional extension project:
+- `e2e-nip07-extension` (opt-in via `PLAYWRIGHT_ENABLE_EXTENSION_E2E=1` and `PLAYWRIGHT_EXTENSION_PATH`)
+
+3. Persistent-context extension launcher:
+- Script: `scripts/playwright/run-extension-persistent.mjs`
+- Command: `npm run test:e2e:extension`
+- Purpose: run extension tests in Chromium with a real persistent profile context.
+
+4. Test harness upgrades:
+- `setTestRelays(urls)` aligns `relayManager` and `nostrClient`.
+- `setSignerDecryptBehavior(mode, opts)` forces decrypt behavior for deterministic list-sync tests.
+- `getListSyncEvents()`, `clearListSyncEvents()`, `waitForListSyncEvent()` capture and assert sync lifecycle.
+
+5. Stable sync/test selectors:
+- Permission prompt, hashtag/subscription statuses, blocked-list status/list/empty state.
+
+## Recommended next steps
+
+1. Add CI extension smoke lane (manual workflow dispatch only)
+- Keep extension smoke out of default PR path.
+- Add a separate workflow that runs only when maintainers provide:
+  - `PLAYWRIGHT_EXTENSION_PATH` artifact or unpacked extension directory
+  - any extension secrets/profile setup needed by the signer.
+
+2. Add extension artifact capture on failure
+- Always upload:
+  - `playwright-report`
+  - video/trace/screenshot for `tests/e2e-extension/**`
+  - JSON summary of `window.nostr` capabilities.
+
+3. Add capability contract test
+- Add a single test that asserts minimum NIP-07 surface before running deeper flows:
+  - `getPublicKey`
+  - `signEvent`
+  - at least one decrypt path (`nip04` or `nip44`).
+
+4. Add "auth ready" test harness API
+- Add a harness method that waits for authenticated app-ready state (`header UI + signer + relay ready`) so tests stop duplicating custom waits.
+
+5. Add deterministic clock/random seed helper in test mode
+- Expose optional fixed clock/random behavior to reduce cross-run variance in event ordering and timeout-sensitive tests.
+
+6. Add a small extension compatibility matrix note
+- Track known-good extension versions for:
+  - Alby/Nostr Connect style extensions
+  - Chromium version pinned in CI.
+
+## Operational guardrails
+
+1. Keep deterministic tests (mock signer + mock relay) as the default required PR gate.
+2. Keep extension tests opt-in until flake rate is low and extension lifecycle setup is automated.
+3. Do not treat extension `content.js` runtime noise as app regression unless bitvid telemetry/events also fail in the same window.
+
diff --git a/js/testHarness.js b/js/testHarness.js
index d423f367..8a98b726 100644
--- a/js/testHarness.js
+++ b/js/testHarness.js
@@ -12,6 +12,8 @@
 //   await page.evaluate(() => window.__bitvidTest__.getAppState());
 
 import { nostrClient } from "./nostrClientFacade.js";
+import { relayManager } from "./relayManager.js";
+import { userBlocks, USER_BLOCK_EVENTS } from "./userBlocks.js";
 import {
   registerSigner,
   setActiveSigner,
@@ -21,7 +23,238 @@ import {
 import { devLogger } from "./utils/logger.js";
 import { STANDARD_TIMEOUT_MS } from "./constants.js";
 
-const HARNESS_VERSION = 1;
+const HARNESS_VERSION = 2;
+const MAX_SYNC_EVENT_BUFFER = 300;
+const SYNC_EVENT_POLL_INTERVAL_MS = 50;
+
+const listSyncEvents = [];
+let listSyncCaptureInstalled = false;
+let removeUserBlockStatusListener = null;
+let removeAuthLoadingListener = null;
+const signerDecryptOriginals = new WeakMap();
+let activeDecryptBehavior = {
+  mode: "passthrough",
+  delayMs: 0,
+  errorMessage: "",
+};
+
+function normalizeRelayList(relayUrls) {
+  if (!Array.isArray(relayUrls)) {
+    return [];
+  }
+  const seen = new Set();
+  const normalized = [];
+  for (const item of relayUrls) {
+    const value = typeof item === "string" ? item.trim() : "";
+    if (!value || seen.has(value)) {
+      continue;
+    }
+    seen.add(value);
+    normalized.push(value);
+  }
+  return normalized;
+}
+
+function pushListSyncEvent(source, detail = {}) {
+  const event = {
+    source: typeof source === "string" ? source : "unknown",
+    at: Date.now(),
+    detail: detail && typeof detail === "object" ? detail : { value: detail },
+  };
+  listSyncEvents.push(event);
+  if (listSyncEvents.length > MAX_SYNC_EVENT_BUFFER) {
+    listSyncEvents.splice(0, listSyncEvents.length - MAX_SYNC_EVENT_BUFFER);
+  }
+}
+
+function installListSyncCapture() {
+  if (listSyncCaptureInstalled || typeof window === "undefined") {
+    return;
+  }
+
+  removeAuthLoadingListener = (event) => {
+    pushListSyncEvent("auth-loading-state", event?.detail || {});
+  };
+  window.addEventListener("bitvid:auth-loading-state", removeAuthLoadingListener);
+
+  if (userBlocks && typeof userBlocks.on === "function") {
+    removeUserBlockStatusListener = userBlocks.on(
+      USER_BLOCK_EVENTS.STATUS,
+      (detail) => {
+        pushListSyncEvent("user-blocks-status", detail || {});
+      },
+    );
+  }
+
+  listSyncCaptureInstalled = true;
+}
+
+function clearListSyncEvents() {
+  listSyncEvents.length = 0;
+}
+
+function getListSyncEvents() {
+  return listSyncEvents.map((entry) => ({
+    source: entry.source,
+    at: entry.at,
+    detail: entry.detail,
+  }));
+}
+
+function matchesListSyncCriteria(event, criteria = {}) {
+  if (!event || typeof event !== "object") {
+    return false;
+  }
+
+  const expectedSource =
+    typeof criteria.source === "string" ? criteria.source.trim() : "";
+  if (expectedSource && event.source !== expectedSource) {
+    return false;
+  }
+
+  const expectedStatus =
+    typeof criteria.status === "string" ? criteria.status.trim() : "";
+  if (expectedStatus && event?.detail?.status !== expectedStatus) {
+    return false;
+  }
+
+  const expectedReason =
+    typeof criteria.reason === "string" ? criteria.reason.trim() : "";
+  if (expectedReason && event?.detail?.reason !== expectedReason) {
+    return false;
+  }
+
+  return true;
+}
+
+function waitForListSyncEvent(criteria = {}, timeoutMs = STANDARD_TIMEOUT_MS) {
+  const timeout = Number.isFinite(timeoutMs)
+    ? Math.max(0, Math.floor(timeoutMs))
+    : STANDARD_TIMEOUT_MS;
+  const startedAt = Date.now();
+
+  return new Promise((resolve, reject) => {
+    const check = () => {
+      for (const event of listSyncEvents) {
+        if (matchesListSyncCriteria(event, criteria)) {
+          resolve(event);
+          return;
+        }
+      }
+
+      if (Date.now() - startedAt >= timeout) {
+        reject(
+          new Error(
+            `[testHarness] Timed out waiting for list sync event: ${JSON.stringify(criteria)}`,
+          ),
+        );
+        return;
+      }
+
+      setTimeout(check, SYNC_EVENT_POLL_INTERVAL_MS);
+    };
+
+    check();
+  });
+}
+
+function normalizeDecryptBehavior(mode, options = {}) {
+  const normalizedMode =
+    typeof mode === "string" ? mode.trim().toLowerCase() : "passthrough";
+  const allowed = new Set(["passthrough", "timeout", "error", "delay"]);
+  const safeMode = allowed.has(normalizedMode) ? normalizedMode : "passthrough";
+  const delayMs = Number.isFinite(options?.delayMs)
+    ? Math.max(0, Math.floor(options.delayMs))
+    : 0;
+  const errorMessage =
+    typeof options?.errorMessage === "string" && options.errorMessage.trim()
+      ? options.errorMessage.trim()
+      : "test-harness decrypt failure";
+  return { mode: safeMode, delayMs, errorMessage };
+}
+
+function ensureSignerDecryptOriginals(signer) {
+  if (!signer || typeof signer !== "object") {
+    return null;
+  }
+  if (!signerDecryptOriginals.has(signer)) {
+    signerDecryptOriginals.set(signer, {
+      nip04Decrypt: signer.nip04Decrypt,
+      nip44Decrypt: signer.nip44Decrypt,
+    });
+  }
+  return signerDecryptOriginals.get(signer);
+}
+
+function buildDecryptWrapper(originalDecrypt, behavior, methodName) {
+  if (typeof originalDecrypt !== "function") {
+    return originalDecrypt;
+  }
+
+  if (behavior.mode === "timeout") {
+    return () => new Promise(() => {});
+  }
+
+  if (behavior.mode === "error") {
+    return async () => {
+      const error = new Error(behavior.errorMessage);
+      error.code = "test-harness-decrypt-error";
+      error.method = methodName;
+      throw error;
+    };
+  }
+
+  if (behavior.mode === "delay") {
+    return async (...args) => {
+      if (behavior.delayMs > 0) {
+        await new Promise((resolve) => setTimeout(resolve, behavior.delayMs));
+      }
+      return originalDecrypt(...args);
+    };
+  }
+
+  return originalDecrypt;
+}
+
+function setSignerDecryptBehavior(mode = "passthrough", options = {}) {
+  const behavior = normalizeDecryptBehavior(mode, options);
+  activeDecryptBehavior = behavior;
+
+  const signer = getActiveSigner();
+  if (!signer || typeof signer !== "object") {
+    return {
+      ok: false,
+      mode: behavior.mode,
+      reason: "no-active-signer",
+    };
+  }
+
+  const originals = ensureSignerDecryptOriginals(signer);
+  if (!originals) {
+    return {
+      ok: false,
+      mode: behavior.mode,
+      reason: "invalid-signer",
+    };
+  }
+
+  signer.nip04Decrypt = buildDecryptWrapper(
+    originals.nip04Decrypt,
+    behavior,
+    "nip04Decrypt",
+  );
+  signer.nip44Decrypt = buildDecryptWrapper(
+    originals.nip44Decrypt,
+    behavior,
+    "nip44Decrypt",
+  );
+
+  return {
+    ok: true,
+    mode: behavior.mode,
+    delayMs: behavior.delayMs,
+  };
+}
 
 /**
  * Check if test mode is enabled via URL param or localStorage.
@@ -77,14 +310,15 @@ export function getTestRelayOverrides() {
  * instead of production relays.
  */
 function applyRelayOverrides(relayUrls) {
-  if (!relayUrls || !relayUrls.length) return false;
+  const normalizedRelays = normalizeRelayList(relayUrls);
+  if (!normalizedRelays.length) return false;
 
   try {
     if (typeof nostrClient.applyRelayPreferences === "function") {
       nostrClient.applyRelayPreferences({
-        all: relayUrls,
-        read: relayUrls,
-        write: relayUrls,
+        all: normalizedRelays,
+        read: normalizedRelays,
+        write: normalizedRelays,
       });
       return true;
     }
@@ -92,9 +326,9 @@ function applyRelayOverrides(relayUrls) {
     // Fallback: directly set relay arrays if available
     if (nostrClient.connectionManager) {
       const cm = nostrClient.connectionManager;
-      cm.relays = [...relayUrls];
-      if (Array.isArray(cm.readRelays)) cm.readRelays = [...relayUrls];
-      if (Array.isArray(cm.writeRelays)) cm.writeRelays = [...relayUrls];
+      cm.relays = [...normalizedRelays];
+      if (Array.isArray(cm.readRelays)) cm.readRelays = [...normalizedRelays];
+      if (Array.isArray(cm.writeRelays)) cm.writeRelays = [...normalizedRelays];
       return true;
     }
   } catch (err) {
@@ -104,6 +338,47 @@ function applyRelayOverrides(relayUrls) {
   return false;
 }
 
+function setTestRelays(relayUrls, options = {}) {
+  const normalizedRelays = normalizeRelayList(relayUrls);
+  if (!normalizedRelays.length) {
+    return { ok: false, reason: "invalid-relays" };
+  }
+
+  const persist = options?.persist !== false;
+  let applied = false;
+
+  try {
+    if (relayManager && typeof relayManager.setEntries === "function") {
+      relayManager.setEntries(
+        normalizedRelays.map((url) => ({ url, mode: "both" })),
+        { allowEmpty: false, updateClient: true },
+      );
+      applied = true;
+    }
+  } catch (error) {
+    devLogger.warn("[testHarness] relayManager.setEntries failed:", error);
+  }
+
+  if (!applied) {
+    applied = applyRelayOverrides(normalizedRelays);
+  } else {
+    applyRelayOverrides(normalizedRelays);
+  }
+
+  if (persist) {
+    try {
+      localStorage.setItem("__bitvidTestRelays__", JSON.stringify(normalizedRelays));
+    } catch (_error) {
+      // ignore storage failures in restricted contexts
+    }
+  }
+
+  return {
+    ok: applied,
+    relays: normalizedRelays,
+  };
+}
+
 /**
  * Login programmatically with a hex private key. Bypasses the login modal.
  * Returns the hex pubkey on success.
@@ -130,6 +405,10 @@ async function loginWithNsec(hexPrivateKey) {
     persist: false,
   });
 
+  if (activeDecryptBehavior.mode !== "passthrough") {
+    setSignerDecryptBehavior(activeDecryptBehavior.mode, activeDecryptBehavior);
+  }
+
   return pubkey;
 }
 
@@ -161,6 +440,15 @@ function getAppState() {
           write: [...(nostrClient.connectionManager.writeRelays || [])],
         }
       : null,
+    relayManager: relayManager
+      ? {
+          all: relayManager.getAllRelayUrls?.() || [],
+          read: relayManager.getReadRelayUrls?.() || [],
+          write: relayManager.getWriteRelayUrls?.() || [],
+          lastLoadSource: relayManager.lastLoadSource || null,
+        }
+      : null,
+    decryptBehavior: { ...activeDecryptBehavior },
   };
 }
 
@@ -257,9 +545,11 @@ export function installTestHarness() {
 
   const testRelays = getTestRelayOverrides();
   if (testRelays) {
-    applyRelayOverrides(testRelays);
+    setTestRelays(testRelays, { persist: false });
   }
 
+  installListSyncCapture();
+
   window.__bitvidTest__ = Object.freeze({
     version: HARNESS_VERSION,
     loginWithNsec,
@@ -270,6 +560,11 @@ export function installTestHarness() {
     waitForSelector,
     getRelayHealth,
     applyRelayOverrides,
+    setTestRelays,
+    setSignerDecryptBehavior,
+    getListSyncEvents,
+    clearListSyncEvents,
+    waitForListSyncEvent,
 
     // Expose nostrClient for advanced test scenarios
     get nostrClient() {
diff --git a/js/ui/profileModal/ProfileBlockListController.js b/js/ui/profileModal/ProfileBlockListController.js
index 9cb23a38..0bbf39f0 100644
--- a/js/ui/profileModal/ProfileBlockListController.js
+++ b/js/ui/profileModal/ProfileBlockListController.js
@@ -100,12 +100,16 @@ export class ProfileBlockListController {
       '[data-role="blocked-list-status"]',
     );
     if (existing instanceof HTMLElement) {
+      if (!existing.dataset.testid) {
+        existing.dataset.testid = "blocked-sync-status";
+      }
       this.blockListStatus = existing;
       return existing;
     }
 
     const status = document.createElement("div");
     status.dataset.role = "blocked-list-status";
+    status.dataset.testid = "blocked-sync-status";
     status.className = "mt-4 flex items-center gap-3 text-sm text-muted hidden";
     status.setAttribute("role", "status");
     status.setAttribute("aria-live", "polite");
diff --git a/js/userBlocks.js b/js/userBlocks.js
index d5ff18a3..c37f859c 100644
--- a/js/userBlocks.js
+++ b/js/userBlocks.js
@@ -89,31 +89,31 @@ const FAST_BLOCKLIST_RELAY_LIMIT = 3;
 const FAST_BLOCKLIST_TIMEOUT_MS = 2500;
 const BACKGROUND_BLOCKLIST_TIMEOUT_MS = 6000;
 const MAX_BACKGROUND_BLOCKLIST_RELAY_LIMIT = 24;
-// PERF: Reduced from 20s/15s to 10s/8s — the signer is now guaranteed to be
-// ready before list loading starts (authSessionCoordinator waits for the
-// permission pre-grant), so decryption should succeed quickly.
-const DECRYPT_TIMEOUT_MS = STANDARD_TIMEOUT_MS;
+// Keep interactive decrypt timeout above extension retry timeout window.
+const DECRYPT_TIMEOUT_MS = Math.max(STANDARD_TIMEOUT_MS, 15000);
 const BACKGROUND_DECRYPT_TIMEOUT_MS = 8000;
 // PERF: Reduced from 10s to 3s for faster recovery during login.
 const DECRYPT_RETRY_DELAY_MS = 3000;
 const MAX_DECRYPT_RETRY_DELAY_MS = 30000;
-
 function computeRetryDelay(baseDelayMs, attempt) {
-  const normalizedAttempt =
-    Number.isFinite(attempt) && attempt > 0 ? Math.floor(attempt) : 0;
+  const normalizedAttempt = Number.isFinite(attempt) && attempt > 0 ? Math.floor(attempt) : 0;
   const multiplier = 2 ** normalizedAttempt;
   const nextDelay = Math.max(250, Math.floor(baseDelayMs * multiplier));
   return Math.min(MAX_DECRYPT_RETRY_DELAY_MS, nextDelay);
 }
 
 function sanitizeRelayList(candidate) {
-  return Array.isArray(candidate)
-    ? candidate
-        .map((url) => (typeof url === "string" ? url.trim() : ""))
-        .filter(Boolean)
-    : [];
+  if (!Array.isArray(candidate)) return [];
+  const seen = new Set();
+  const relays = [];
+  for (const value of candidate) {
+    const normalized = typeof value === "string" ? value.trim() : "";
+    if (!normalized || seen.has(normalized)) continue;
+    seen.add(normalized);
+    relays.push(normalized);
+  }
+  return relays;
 }
-
 function normalizeEncryptionToken(value) {
   if (typeof value !== "string") {
     return "";
@@ -1526,17 +1526,23 @@ class UserBlockListManager {
             return;
           }
           if (decryptionError.code === "user-blocklist-decrypt-timeout") {
-            const signerStatus =
-              decryptionError.signerStatus || resolveSignerStatus();
-
-            // If decrypt times out, restore the previous state to avoid wiping the user's blocks.
-            // We then schedule a background retry.
-            this.blockedPubkeys = previousState.blockedPubkeys;
-            this._privateBlocks = previousState.privateBlocks;
-            this._publicMutes = previousState.publicMutes;
-            this.blockEventId = previousState.blockEventId;
-            this.blockEventCreatedAt = previousState.blockEventCreatedAt;
-            this.loaded = true; // Mark as loaded so UI renders, even if stale
+            const signerStatus = decryptionError.signerStatus || resolveSignerStatus();
+            const recoveredPrivateBlocks = new Set(previousState.privateBlocks);
+            const recoveredPublicMutes = new Set([
+              ...previousState.publicMutes,
+              ...extractPubkeysFromTags(newestStandard?.tags, normalized, {
+                limit: MAX_BLOCKLIST_ENTRIES,
+              }),
+            ]);
+            this.blockEventId = newestOverall?.id || previousState.blockEventId;
+            this.blockEventCreatedAt =
+              Number.isFinite(newestCreatedAt) ? newestCreatedAt : previousState.blockEventCreatedAt;
+            applySets(recoveredPrivateBlocks, recoveredPublicMutes, {
+              source,
+              reason: "decrypt-timeout-partial",
+              events: [newestStandard?.id, newestLegacy?.id].filter(Boolean),
+            });
+            this.loaded = true;
 
             emitStatus({
               status: "stale",
diff --git a/package.json b/package.json
index 5e8ebbe0..dac3b88e 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,11 @@
     "check:css": "npm run build:css",
     "test:visual": "npm run build && npx playwright test",
     "test:visual:update": "npm run build && cross-env UPDATE_VISUAL_BASELINES=1 npx playwright test",
-    "test:e2e": "npm run build && npx playwright test tests/e2e",
+    "test:e2e": "npm run build && npx playwright test tests/e2e --project=e2e --project=e2e-firefox",
+    "test:e2e:chromium": "npm run build && npx playwright test tests/e2e --project=e2e",
+    "test:e2e:firefox": "npm run build && npx playwright test tests/e2e --project=e2e-firefox",
+    "test:e2e:deterministic": "npm run build && npx playwright test tests/e2e --project=e2e --project=e2e-firefox",
+    "test:e2e:extension": "npm run build && node scripts/playwright/run-extension-persistent.mjs",
     "test:load": "node scripts/agent/load-test.mjs",
     "test:smoke": "node scripts/agent/smoke-test.mjs",
     "test:dm:unit": "node scripts/run-targeted-tests.mjs tests/dm-db.test.mjs tests/dm-decryptor.test.mjs tests/dm-normalization.test.mjs tests/nostr-send-direct-message.test.mjs",
diff --git a/playwright.config.ts b/playwright.config.ts
index 7ccf7d60..fadf1125 100644
--- a/playwright.config.ts
+++ b/playwright.config.ts
@@ -1,8 +1,49 @@
 import { defineConfig } from "@playwright/test";
+import path from "node:path";
 
 const HOST = process.env.PLAYWRIGHT_HOST ?? "127.0.0.1";
 const PORT = Number.parseInt(process.env.PLAYWRIGHT_PORT ?? "4173", 10);
 const BASE_URL = process.env.PLAYWRIGHT_BASE_URL ?? `http://${HOST}:${PORT}`;
+const ENABLE_EXTENSION_E2E = process.env.PLAYWRIGHT_ENABLE_EXTENSION_E2E === "1";
+const EXTENSION_PATH = process.env.PLAYWRIGHT_EXTENSION_PATH
+  ? path.resolve(process.env.PLAYWRIGHT_EXTENSION_PATH)
+  : "";
+
+const projects = [
+  {
+    name: "visual",
+    testMatch: "visual/**/*.spec.ts",
+    use: {
+      screenshot: "only-on-failure",
+      trace: "retain-on-failure",
+      video: "retain-on-failure",
+    },
+  },
+  {
+    name: "e2e",
+    testMatch: "e2e/**/*.spec.ts",
+    use: {
+      browserName: "chromium",
+    },
+  },
+  {
+    name: "e2e-firefox",
+    testMatch: "e2e/**/*.spec.ts",
+    use: {
+      browserName: "firefox",
+    },
+  },
+];
+
+if (ENABLE_EXTENSION_E2E && EXTENSION_PATH) {
+  projects.push({
+    name: "e2e-nip07-extension",
+    testMatch: "e2e-extension/**/*.spec.ts",
+    use: {
+      browserName: "chromium",
+    },
+  });
+}
 
 export default defineConfig({
   testDir: "./tests",
@@ -16,21 +57,7 @@ export default defineConfig({
     viewport: { width: 1280, height: 720 },
     ignoreHTTPSErrors: true,
   },
-  projects: [
-    {
-      name: "visual",
-      testMatch: "visual/**/*.spec.ts",
-      use: {
-        screenshot: "only-on-failure",
-        trace: "retain-on-failure",
-        video: "retain-on-failure",
-      },
-    },
-    {
-      name: "e2e",
-      testMatch: "e2e/**/*.spec.ts",
-    },
-  ],
+  projects,
   webServer: {
     command: `npx http-server . -p ${PORT} -a ${HOST} -c-1 --silent`,
     url: `${BASE_URL}/docs/kitchen-sink.html`,
diff --git a/scripts/playwright/run-extension-persistent.mjs b/scripts/playwright/run-extension-persistent.mjs
new file mode 100644
index 00000000..501324af
--- /dev/null
+++ b/scripts/playwright/run-extension-persistent.mjs
@@ -0,0 +1,49 @@
+#!/usr/bin/env node
+
+import { spawn } from "node:child_process";
+import path from "node:path";
+import process from "node:process";
+
+function resolveEnvPath(value) {
+  if (typeof value !== "string" || !value.trim()) {
+    return "";
+  }
+  return path.resolve(value.trim());
+}
+
+const extensionPath = resolveEnvPath(process.env.PLAYWRIGHT_EXTENSION_PATH || "");
+if (!extensionPath) {
+  console.error(
+    "PLAYWRIGHT_EXTENSION_PATH is required. Example:\n" +
+      "PLAYWRIGHT_EXTENSION_PATH=/abs/path/to/extension npm run test:e2e:extension",
+  );
+  process.exit(1);
+}
+
+const extraArgs = process.argv.slice(2);
+const testArgs = [
+  "playwright",
+  "test",
+  "tests/e2e-extension",
+  "--project=e2e-nip07-extension",
+  ...extraArgs,
+];
+
+const child = spawn("npx", testArgs, {
+  stdio: "inherit",
+  shell: false,
+  env: {
+    ...process.env,
+    PLAYWRIGHT_ENABLE_EXTENSION_E2E: "1",
+    PLAYWRIGHT_EXTENSION_PATH: extensionPath,
+  },
+});
+
+child.on("exit", (code, signal) => {
+  if (signal) {
+    process.kill(process.pid, signal);
+    return;
+  }
+  process.exit(code ?? 1);
+});
+
diff --git a/tests/e2e-extension/helpers/persistentExtensionFixture.ts b/tests/e2e-extension/helpers/persistentExtensionFixture.ts
new file mode 100644
index 00000000..215b9c63
--- /dev/null
+++ b/tests/e2e-extension/helpers/persistentExtensionFixture.ts
@@ -0,0 +1,88 @@
+import { test as base, expect, chromium, type BrowserContext, type Page } from "@playwright/test";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+
+type PersistentExtensionFixtures = {
+  persistentContext: BrowserContext;
+  extensionPath: string;
+  extensionUserDataDir: string;
+};
+
+export const test = base.extend<PersistentExtensionFixtures>({
+  extensionPath: [
+    async ({}, use) => {
+      const rawPath = process.env.PLAYWRIGHT_EXTENSION_PATH || "";
+      const resolved = rawPath ? path.resolve(rawPath) : "";
+      if (!resolved) {
+        throw new Error(
+          "PLAYWRIGHT_EXTENSION_PATH is required for extension E2E tests.",
+        );
+      }
+      await use(resolved);
+    },
+    { scope: "worker" },
+  ],
+
+  extensionUserDataDir: [
+    async ({}, use, testInfo) => {
+      const provided = process.env.PLAYWRIGHT_EXTENSION_USER_DATA_DIR || "";
+      if (provided.trim()) {
+        await use(path.resolve(provided.trim()));
+        return;
+      }
+
+      const dir = await fs.mkdtemp(
+        path.join(
+          os.tmpdir(),
+          `bitvid-playwright-extension-${testInfo.workerIndex}-`,
+        ),
+      );
+      try {
+        await use(dir);
+      } finally {
+        await fs.rm(dir, { recursive: true, force: true });
+      }
+    },
+    { scope: "worker" },
+  ],
+
+  persistentContext: [
+    async ({ extensionPath, extensionUserDataDir }, use) => {
+      const context = await chromium.launchPersistentContext(
+        extensionUserDataDir,
+        {
+          headless: false,
+          viewport: { width: 1280, height: 720 },
+          args: [
+            `--disable-extensions-except=${extensionPath}`,
+            `--load-extension=${extensionPath}`,
+          ],
+        },
+      );
+
+      try {
+        await use(context);
+      } finally {
+        await context.close();
+      }
+    },
+    { scope: "worker" },
+  ],
+
+  context: async ({ persistentContext }, use) => {
+    await use(persistentContext);
+  },
+
+  page: async ({ persistentContext, baseURL }, use) => {
+    const existing = persistentContext.pages()[0] || null;
+    const page = existing || (await persistentContext.newPage());
+    if (baseURL) {
+      await page.goto(baseURL);
+    }
+    await use(page);
+  },
+});
+
+export { expect };
+
diff --git a/tests/e2e-extension/nip07-extension.smoke.spec.ts b/tests/e2e-extension/nip07-extension.smoke.spec.ts
new file mode 100644
index 00000000..1e30c624
--- /dev/null
+++ b/tests/e2e-extension/nip07-extension.smoke.spec.ts
@@ -0,0 +1,34 @@
+import { test, expect } from "./helpers/persistentExtensionFixture";
+
+test.describe("NIP-07 extension smoke", () => {
+  test("extension injects a NIP-07 API surface", async ({ page }) => {
+    await page.goto("/");
+
+    await page.waitForFunction(
+      () =>
+        typeof (window as any).nostr === "object" &&
+        (typeof (window as any).nostr.getPublicKey === "function" ||
+          typeof (window as any).nostr.nip04?.decrypt === "function" ||
+          typeof (window as any).nostr.nip44?.decrypt === "function"),
+      { timeout: 15_000 },
+    );
+
+    const capabilities = await page.evaluate(() => {
+      const api = (window as any).nostr;
+      return {
+        hasGetPublicKey: typeof api?.getPublicKey === "function",
+        hasSignEvent: typeof api?.signEvent === "function",
+        hasNip04Decrypt: typeof api?.nip04?.decrypt === "function",
+        hasNip44Decrypt:
+          typeof api?.nip44?.decrypt === "function" ||
+          typeof api?.nip44?.v2?.decrypt === "function",
+      };
+    });
+
+    expect(
+      capabilities.hasGetPublicKey ||
+        capabilities.hasNip04Decrypt ||
+        capabilities.hasNip44Decrypt,
+    ).toBe(true);
+  });
+});
diff --git a/tests/e2e/agent-testability.spec.ts b/tests/e2e/agent-testability.spec.ts
index dc5d37ff..979f287b 100644
--- a/tests/e2e/agent-testability.spec.ts
+++ b/tests/e2e/agent-testability.spec.ts
@@ -26,7 +26,7 @@ test.describe("Agent testability infrastructure", () => {
     });
 
     expect(harness).not.toBeNull();
-    expect(harness!.version).toBe(1);
+    expect(harness!.version).toBe(2);
   });
 
   test("relay overrides are applied via query params", async ({
@@ -49,6 +49,29 @@ test.describe("Agent testability infrastructure", () => {
     }
   });
 
+  test("setTestRelays aligns relayManager and nostrClient", async ({
+    page,
+    gotoApp,
+    relayUrl,
+  }) => {
+    await gotoApp();
+
+    const result = await page.evaluate((url) => {
+      const harness = (window as any).__bitvidTest__;
+      if (!harness || typeof harness.setTestRelays !== "function") {
+        throw new Error("setTestRelays missing");
+      }
+      return harness.setTestRelays([url]);
+    }, relayUrl);
+    expect(result.ok).toBe(true);
+
+    const state = await page.evaluate(() => {
+      return (window as any).__bitvidTest__.getAppState();
+    });
+    expect(state.relays.read).toEqual([relayUrl]);
+    expect(state.relayManager.read).toEqual([relayUrl]);
+  });
+
   test("programmatic login works via test harness", async ({
     page,
     relay,
@@ -133,10 +156,15 @@ test.describe("Data-testid selectors are present", () => {
     // Open the login modal
     await page.locator('[data-testid="login-button"]').click();
 
-    // Wait for modal to be visible
-    await expect(page.locator('[data-testid="login-modal"]')).toBeVisible({
-      timeout: 15000,
-    });
+    // Wait for modal to transition into an open, visible state.
+    await page.waitForFunction(() => {
+      const modal = document.querySelector('[data-testid="login-modal"]');
+      if (!(modal instanceof HTMLElement)) {
+        return false;
+      }
+      const openAttr = modal.getAttribute("data-open");
+      return openAttr === "true" && !modal.classList.contains("hidden");
+    }, { timeout: 15000 });
 
     // Check provider buttons exist
     const providerButtons = page.locator(
@@ -186,4 +214,32 @@ test.describe("App state inspection", () => {
     });
     expect(state.isLoggedIn).toBe(false);
   });
+
+  test("list sync event capture APIs are available", async ({
+    page,
+    gotoApp,
+  }) => {
+    await gotoApp();
+
+    const result = await page.evaluate(() => {
+      const harness = (window as any).__bitvidTest__;
+      if (!harness) {
+        throw new Error("Harness missing");
+      }
+      harness.clearListSyncEvents();
+      window.dispatchEvent(
+        new CustomEvent("bitvid:auth-loading-state", {
+          detail: { lists: "loading", listsDetail: { ready: false } },
+        }),
+      );
+      const events = harness.getListSyncEvents();
+      return {
+        count: events.length,
+        firstSource: events[0]?.source || "",
+      };
+    });
+
+    expect(result.count).toBeGreaterThan(0);
+    expect(result.firstSource).toBe("auth-loading-state");
+  });
 });
diff --git a/tests/e2e/helpers/bitvidTestFixture.ts b/tests/e2e/helpers/bitvidTestFixture.ts
index 467531a7..bfbaeee7 100644
--- a/tests/e2e/helpers/bitvidTestFixture.ts
+++ b/tests/e2e/helpers/bitvidTestFixture.ts
@@ -149,6 +149,22 @@ type BitvidFixtures = {
   clearRelay: () => Promise<void>;
   gotoApp: (path?: string) => Promise<void>;
   loginAs: (page: Page) => Promise<string>;
+  setTestRelays: (page: Page, relays: string[]) => Promise<any>;
+  setDecryptBehavior: (
+    page: Page,
+    mode: "passthrough" | "timeout" | "error" | "delay",
+    options?: { delayMs?: number; errorMessage?: string },
+  ) => Promise<any>;
+  startDiagnostics: (
+    page: Page,
+    options?: { captureSyncEvents?: boolean },
+  ) => Promise<{
+    stop: () => Promise<{
+      console: Array<{ type: string; text: string }>;
+      pageErrors: string[];
+      syncEvents: any[];
+    }>;
+  }>;
   testPubkey: string;
   testPrivateKey: string;
   relayUrl: string;
@@ -207,6 +223,92 @@ export const test = base.extend<BitvidFixtures>({
     });
   },
 
+  setTestRelays: async ({}, use) => {
+    await use(async (page: Page, relays: string[]) => {
+      return page.evaluate((urls) => {
+        const harness = (window as any).__bitvidTest__;
+        if (!harness || typeof harness.setTestRelays !== "function") {
+          throw new Error("setTestRelays is not available in test harness");
+        }
+        return harness.setTestRelays(urls);
+      }, relays);
+    });
+  },
+
+  setDecryptBehavior: async ({}, use) => {
+    await use(
+      async (
+        page: Page,
+        mode: "passthrough" | "timeout" | "error" | "delay",
+        options = {},
+      ) => {
+        return page.evaluate(
+          ({ nextMode, nextOptions }) => {
+            const harness = (window as any).__bitvidTest__;
+            if (!harness || typeof harness.setSignerDecryptBehavior !== "function") {
+              throw new Error(
+                "setSignerDecryptBehavior is not available in test harness",
+              );
+            }
+            return harness.setSignerDecryptBehavior(nextMode, nextOptions);
+          },
+          { nextMode: mode, nextOptions: options },
+        );
+      },
+    );
+  },
+
+  startDiagnostics: async ({}, use) => {
+    await use(async (page: Page, options = {}) => {
+      const consoleEntries: Array<{ type: string; text: string }> = [];
+      const pageErrors: string[] = [];
+      const captureSyncEvents = options.captureSyncEvents !== false;
+
+      const onConsole = (message: any) => {
+        consoleEntries.push({
+          type: message.type(),
+          text: message.text(),
+        });
+      };
+      const onPageError = (error: Error) => {
+        pageErrors.push(error?.message || String(error));
+      };
+
+      page.on("console", onConsole);
+      page.on("pageerror", onPageError);
+
+      if (captureSyncEvents) {
+        await page.evaluate(() => {
+          const harness = (window as any).__bitvidTest__;
+          if (harness && typeof harness.clearListSyncEvents === "function") {
+            harness.clearListSyncEvents();
+          }
+        });
+      }
+
+      return {
+        stop: async () => {
+          page.off("console", onConsole);
+          page.off("pageerror", onPageError);
+          const syncEvents = captureSyncEvents
+            ? await page.evaluate(() => {
+                const harness = (window as any).__bitvidTest__;
+                if (harness && typeof harness.getListSyncEvents === "function") {
+                  return harness.getListSyncEvents();
+                }
+                return [];
+              })
+            : [];
+          return {
+            console: consoleEntries,
+            pageErrors,
+            syncEvents,
+          };
+        },
+      };
+    });
+  },
+
   testPubkey: TEST_PK,
   testPrivateKey: TEST_PRIVATE_KEY_HEX,
   relayUrl: async ({ relay }, use) => {
diff --git a/tests/e2e/profile-list-sync-diagnostics.spec.ts b/tests/e2e/profile-list-sync-diagnostics.spec.ts
new file mode 100644
index 00000000..4955245a
--- /dev/null
+++ b/tests/e2e/profile-list-sync-diagnostics.spec.ts
@@ -0,0 +1,185 @@
+import { test, expect } from "./helpers/bitvidTestFixture";
+import { finalizeEvent, getPublicKey } from "nostr-tools";
+
+function makeHex(char: string) {
+  return char.repeat(64);
+}
+
+test.describe("Profile list sync diagnostics", () => {
+  test("captures console + page errors during login/profile sync baseline", async ({
+    page,
+    gotoApp,
+    loginAs,
+    testPubkey,
+    relayUrl,
+    setTestRelays,
+    startDiagnostics,
+  }) => {
+    const diagnostics = await startDiagnostics(page);
+
+    await gotoApp();
+    await loginAs(page);
+    await setTestRelays(page, [relayUrl]);
+
+    await page.waitForFunction(
+      () => Boolean((window as any).__bitvidTest__?.getAppState?.()?.isLoggedIn),
+      { timeout: 15_000 },
+    );
+
+    const appState = await page.evaluate(() => {
+      return (window as any).__bitvidTest__.getAppState();
+    });
+    expect(appState.isLoggedIn).toBe(true);
+
+    const syncState = await page.evaluate(async (activePubkey) => {
+      const module = await import("/js/userBlocks.js");
+      const manager = module.userBlocks;
+      const statuses: any[] = [];
+      const unsubscribe = manager.on("status", (detail: any) => {
+        statuses.push(detail);
+      });
+      try {
+        await manager.loadBlocks(activePubkey, {
+          allowPermissionPrompt: false,
+          decryptTimeoutMs: 250,
+        });
+      } finally {
+        if (typeof unsubscribe === "function") unsubscribe();
+      }
+      return {
+        statuses,
+        blockedPubkeys: manager.getBlockedPubkeys(),
+      };
+    }, testPubkey);
+
+    const diagnosticsResult = await diagnostics.stop();
+    const appErrorLogs = diagnosticsResult.console.filter(
+      (entry) =>
+        entry.type === "error" ||
+        entry.text.includes("[UserBlockList]") ||
+        entry.text.includes("profile list") ||
+        entry.text.includes("blocked creators"),
+    );
+
+    expect(Array.isArray(syncState.statuses)).toBe(true);
+    expect(Array.isArray(syncState.blockedPubkeys)).toBe(true);
+
+    // Diagnostic output is intentionally logged for local triage.
+    console.log(
+      JSON.stringify(
+        {
+          phase: "baseline",
+          appState,
+          consoleCount: diagnosticsResult.console.length,
+          pageErrorCount: diagnosticsResult.pageErrors.length,
+          appErrorLogs,
+          syncEventsTail: diagnosticsResult.syncEvents.slice(-8),
+          statusTail: syncState.statuses.slice(-8),
+          blockedPubkeys: syncState.blockedPubkeys,
+        },
+        null,
+        2,
+      ),
+    );
+  });
+
+  test("forced decrypt-timeout still ingests public mute tags", async ({
+    page,
+    gotoApp,
+    loginAs,
+    seedRawEvent,
+    testPubkey,
+    testPrivateKey,
+    relayUrl,
+    setTestRelays,
+    setDecryptBehavior,
+    startDiagnostics,
+  }) => {
+    const publicBlocked = makeHex("a");
+    const privateKeyBytes = Uint8Array.from(Buffer.from(testPrivateKey, "hex"));
+    const derivedPubkey = getPublicKey(privateKeyBytes);
+    const staleEvent = finalizeEvent(
+      {
+        kind: 10000,
+        created_at: Math.floor(Date.now() / 1000),
+        tags: [
+          ["encrypted", "nip44"],
+          ["p", publicBlocked],
+        ],
+        content: "ciphertext-timeout",
+      },
+      privateKeyBytes,
+    );
+    await seedRawEvent(staleEvent);
+
+    const diagnostics = await startDiagnostics(page);
+
+    await gotoApp();
+    await loginAs(page);
+    await setTestRelays(page, [relayUrl]);
+    await page.waitForFunction(
+      () => Boolean((window as any).__bitvidTest__?.getAppState?.()?.isLoggedIn),
+      { timeout: 15_000 },
+    );
+
+    let result: any = null;
+    try {
+      await setDecryptBehavior(page, "timeout");
+      result = await page.evaluate(
+        async ({ activePubkey, blockedPubkey }) => {
+          const blocksModule = await import("/js/userBlocks.js");
+          const manager = blocksModule.userBlocks;
+
+          const statuses: any[] = [];
+          const unsubscribe = manager.on("status", (detail: any) => {
+            statuses.push(detail);
+          });
+
+          try {
+            await manager.loadBlocks(activePubkey, {
+              allowPermissionPrompt: false,
+              decryptTimeoutMs: 80,
+            });
+          } finally {
+            if (typeof unsubscribe === "function") unsubscribe();
+          }
+
+          return {
+            statuses,
+            blockedPubkeys: manager.getBlockedPubkeys(),
+            containsPublicMute: manager.getBlockedPubkeys().includes(blockedPubkey),
+          };
+        },
+        { activePubkey: testPubkey, blockedPubkey: publicBlocked },
+      );
+
+      expect(testPubkey).toBe(derivedPubkey);
+      expect(result.containsPublicMute).toBe(true);
+      expect(
+        result.statuses.some(
+          (entry: any) =>
+            entry?.status === "stale" && entry?.reason === "decrypt-timeout",
+        ),
+      ).toBe(true);
+    } finally {
+      await setDecryptBehavior(page, "passthrough");
+    }
+
+    const diagnosticsResult = await diagnostics.stop();
+
+    console.log(
+      JSON.stringify(
+        {
+          phase: "forced-timeout",
+          consoleCount: diagnosticsResult.console.length,
+          pageErrorCount: diagnosticsResult.pageErrors.length,
+          syncEventsTail: diagnosticsResult.syncEvents.slice(-10),
+          statusTail: result?.statuses?.slice?.(-10) || [],
+          blockedPubkeys: result?.blockedPubkeys || [],
+        },
+        null,
+        2,
+      ),
+    );
+  });
+});
diff --git a/tests/user-blocks.test.mjs b/tests/user-blocks.test.mjs
index 06d4e8c8..86c4b7d9 100644
--- a/tests/user-blocks.test.mjs
+++ b/tests/user-blocks.test.mjs
@@ -1469,3 +1469,110 @@ await (async () => {
     window.nostr = originalNostr;
   }
 })();
+
+await (async () => {
+  // Test: decrypt timeout should still apply public p-tags while preserving
+  // existing private blocks.
+  const actor = "6".repeat(64);
+  const existingPrivateBlocked = "7".repeat(64);
+  const publicBlocked = "8".repeat(64);
+
+  const UserBlockListManager = userBlocks.constructor;
+  const manager = new UserBlockListManager();
+
+  const originalRelays = Array.isArray(nostrClient.relays)
+    ? [...nostrClient.relays]
+    : nostrClient.relays;
+  const originalWriteRelays = Array.isArray(nostrClient.writeRelays)
+    ? [...nostrClient.writeRelays]
+    : nostrClient.writeRelays;
+  const originalPool = nostrClient.pool;
+  const originalSigner = getActiveSigner();
+  const originalRelayEntries = relayManager.getEntries();
+
+  const relayUrls = ["wss://decrypt-timeout-partial.example"];
+  relayManager.setEntries(
+    relayUrls.map((url) => ({ url, mode: "both" })),
+    { allowEmpty: false, updateClient: false },
+  );
+
+  nostrClient.relays = relayUrls;
+  nostrClient.writeRelays = relayUrls;
+  nostrClient.pool = {
+    list: async () => [
+      {
+        id: "event-timeout-partial",
+        kind: 10000,
+        created_at: 21_000,
+        pubkey: actor,
+        content: "ciphertext-timeout",
+        tags: [
+          ["encrypted", "nip44"],
+          ["p", publicBlocked],
+        ],
+      },
+    ],
+  };
+
+  setActiveSigner({
+    getPublicKey: async () => actor,
+    nip44Decrypt: async () => new Promise(() => {}),
+  });
+
+  manager._privateBlocks = new Set([existingPrivateBlocked]);
+  manager._publicMutes = new Set();
+  manager.blockedPubkeys = new Set([existingPrivateBlocked]);
+  manager.blockEventId = "event-previous";
+  manager.blockEventCreatedAt = 20_000;
+  manager.loaded = true;
+
+  const statusEvents = [];
+  const unsubscribe = manager.on(USER_BLOCK_EVENTS.STATUS, (detail) => {
+    statusEvents.push(detail);
+  });
+
+  try {
+    await manager.loadBlocks(actor, {
+      allowPermissionPrompt: false,
+      decryptTimeoutMs: 30,
+    });
+
+    const blocked = manager.getBlockedPubkeys();
+    assert.equal(
+      blocked.includes(existingPrivateBlocked),
+      true,
+      "timeout fallback should preserve previously decrypted private blocks",
+    );
+    assert.equal(
+      blocked.includes(publicBlocked),
+      true,
+      "timeout fallback should still ingest public mute p-tags",
+    );
+    assert.equal(
+      manager.blockEventId,
+      "event-timeout-partial",
+      "timeout fallback should keep metadata anchored to the newest relay event",
+    );
+    assert(
+      statusEvents.some(
+        (detail) =>
+          detail?.status === "stale" && detail?.reason === "decrypt-timeout",
+      ),
+      "timeout fallback should emit stale decrypt-timeout status",
+    );
+  } finally {
+    unsubscribe?.();
+    relayManager.setEntries(
+      originalRelayEntries,
+      { allowEmpty: false, updateClient: false },
+    );
+    nostrClient.relays = originalRelays;
+    nostrClient.writeRelays = originalWriteRelays;
+    nostrClient.pool = originalPool;
+    clearActiveSigner();
+    if (originalSigner) {
+      setActiveSigner(originalSigner);
+    }
+    manager.reset();
+  }
+})();