diff --git a/js/app/feedCoordinator.js b/js/app/feedCoordinator.js
index 106201b0..616a2e5d 100644
--- a/js/app/feedCoordinator.js
+++ b/js/app/feedCoordinator.js
@@ -9,7 +9,7 @@
  * Methods use `this` which is bound to the Application instance.
  */
 
-import { FEED_TYPES } from "../constants.js";
+import { FEED_TYPES, STANDARD_TIMEOUT_MS, MEDIUM_TIMEOUT_MS } from "../constants.js";
 
 /**
  * @param {object} deps - Injected dependencies.
@@ -926,7 +926,7 @@ export function createFeedCoordinator(deps) {
 
       // Give the app a grace period to establish initial connections before complaining.
       const now = Date.now();
-      const GRACE_PERIOD_MS = 10000;
+      const GRACE_PERIOD_MS = STANDARD_TIMEOUT_MS;
       if (now - (this.appStartedAt || now) < GRACE_PERIOD_MS) {
         return false;
       }
@@ -941,7 +941,7 @@ export function createFeedCoordinator(deps) {
         return false;
       }
 
-      const cooldownMs = 30000;
+      const cooldownMs = MEDIUM_TIMEOUT_MS;
       if (now - (this.lastRelayHealthWarningAt || 0) < cooldownMs) {
         return true;
       }
diff --git a/js/channelProfile.js b/js/channelProfile.js
index fbe4667c..129cea21 100644
--- a/js/channelProfile.js
+++ b/js/channelProfile.js
@@ -26,6 +26,7 @@ import {
   DEFAULT_BLUR_THRESHOLD,
   DEFAULT_TRUSTED_MUTE_HIDE_THRESHOLD,
   DEFAULT_TRUSTED_SPAM_HIDE_THRESHOLD,
+  FIVE_MINUTES_MS,
 } from "./constants.js";
 import {
   applyModerationContextDatasets,
@@ -1310,7 +1311,7 @@ let currentProfileLoadToken = 0;
 
 const FALLBACK_CHANNEL_BANNER = "assets/jpg/bitvid.jpg";
 const FALLBACK_CHANNEL_AVATAR = "assets/svg/default-profile.svg";
-const PROFILE_EVENT_CACHE_TTL_MS = 5 * 60 * 1000;
+const PROFILE_EVENT_CACHE_TTL_MS = FIVE_MINUTES_MS;
 
 const channelProfileMetadataCache = new Map();
 
diff --git a/js/constants.js b/js/constants.js
index eedfe2f5..0deab851 100644
--- a/js/constants.js
+++ b/js/constants.js
@@ -9,6 +9,27 @@ import {
   IS_DEV_MODE,
 } from "./config.js";
 
+// Time constants in milliseconds
+export const ONE_SECOND_MS = 1000;
+export const ONE_MINUTE_MS = 60 * ONE_SECOND_MS;
+export const FIVE_MINUTES_MS = 5 * ONE_MINUTE_MS;
+export const TEN_MINUTES_MS = 10 * ONE_MINUTE_MS;
+export const FORTY_FIVE_MINUTES_MS = 45 * ONE_MINUTE_MS;
+export const ONE_HOUR_MS = 60 * ONE_MINUTE_MS;
+export const ONE_DAY_MS = 24 * ONE_HOUR_MS;
+
+// Specific timeouts and TTLs
+export const SHORT_TIMEOUT_MS = 5000;
+export const STANDARD_TIMEOUT_MS = 10000;
+export const MEDIUM_TIMEOUT_MS = 30000;
+export const LONG_TIMEOUT_MS = 60000;
+
+export const DEFAULT_CACHE_TTL_MS = FIVE_MINUTES_MS;
+export const PROFILE_CACHE_TTL_MS = TEN_MINUTES_MS;
+export const URL_HEALTH_TTL_MS = FORTY_FIVE_MINUTES_MS;
+export const URL_HEALTH_RETRY_MS = FIVE_MINUTES_MS;
+export const URL_PROBE_TIMEOUT_MS = 8 * ONE_SECOND_MS;
+
 function coerceNonNegativeInteger(value, fallback) {
   const numeric = Number(value);
   if (!Number.isFinite(numeric)) {
diff --git a/js/gridHealth.js b/js/gridHealth.js
index 19669701..f5bedf8e 100644
--- a/js/gridHealth.js
+++ b/js/gridHealth.js
@@ -13,6 +13,7 @@ import {
   getViewportCenter,
   PRIORITY_BASELINE,
 } from "./gridHealthLogic.js";
+import { FIVE_MINUTES_MS } from "./constants.js";
 
 const badgeUpdateListeners = new Set();
 
@@ -227,7 +228,7 @@ function queueProbe(magnet, cacheKey, priority = 0, webSeeds = []) {
   return job;
 }
 
-const PROBE_CACHE_TTL_MS = 5 * 60 * 1000;
+const PROBE_CACHE_TTL_MS = FIVE_MINUTES_MS;
 const PROBE_TIMEOUT_MS = 20000;
 const PROBE_CONCURRENCY = 96;
 const PROBE_POLL_COUNT = 3;
diff --git a/js/nostr/cachePolicies.js b/js/nostr/cachePolicies.js
index d269a72b..c8978ff0 100644
--- a/js/nostr/cachePolicies.js
+++ b/js/nostr/cachePolicies.js
@@ -1,5 +1,6 @@
 import { NOTE_TYPES } from "../nostrEventSchemas.js";
 import { WATCH_HISTORY_LIST_IDENTIFIER } from "../config.js";
+import { FIVE_MINUTES_MS, TEN_MINUTES_MS, ONE_DAY_MS } from "../constants.js";
 
 export const STORAGE_TIERS = Object.freeze({
   MEMORY: "memory",
@@ -15,13 +16,13 @@ export const MERGE_STRATEGIES = Object.freeze({
 export const CACHE_POLICIES = Object.freeze({
   [NOTE_TYPES.VIDEO_POST]: {
     storage: STORAGE_TIERS.INDEXED_DB,
-    ttl: 10 * 60 * 1000, // 10 minutes
+    ttl: TEN_MINUTES_MS,
     addressing: "kind:pubkey:d",
     merge: MERGE_STRATEGIES.REPLACEABLE,
   },
   [NOTE_TYPES.WATCH_HISTORY]: {
     storage: STORAGE_TIERS.LOCAL_STORAGE,
-    ttl: 24 * 60 * 60 * 1000, // 24 hours
+    ttl: ONE_DAY_MS,
     addressing: "kind:pubkey:d",
     defaultDTag: WATCH_HISTORY_LIST_IDENTIFIER,
     merge: MERGE_STRATEGIES.APPEND_ONLY, // Bucketed append
@@ -64,13 +65,13 @@ export const CACHE_POLICIES = Object.freeze({
   },
   [NOTE_TYPES.VIDEO_COMMENT]: {
     storage: STORAGE_TIERS.MEMORY,
-    ttl: 5 * 60 * 1000, // 5 minutes
+    ttl: FIVE_MINUTES_MS,
     addressing: "id",
     merge: MERGE_STRATEGIES.APPEND_ONLY,
   },
   [NOTE_TYPES.VIDEO_REACTION]: {
     storage: STORAGE_TIERS.MEMORY,
-    ttl: 5 * 60 * 1000, // 5 minutes
+    ttl: FIVE_MINUTES_MS,
     addressing: "id",
     merge: MERGE_STRATEGIES.APPEND_ONLY,
   },
diff --git a/js/nostr/managers/ConnectionManager.js b/js/nostr/managers/ConnectionManager.js
index 85ce904f..35fff540 100644
--- a/js/nostr/managers/ConnectionManager.js
+++ b/js/nostr/managers/ConnectionManager.js
@@ -26,6 +26,7 @@ import {
   RELAY_FAILURE_WINDOW_THRESHOLD,
   RELAY_SUMMARY_LOG_INTERVAL_MS,
 } from "../relayConstants.js";
+import { LONG_TIMEOUT_MS } from "../../constants.js";
 
 function withRequestTimeout(promise, timeoutMs, onTimeout, message = "Request timed out") {
   const resolvedTimeout = Number(timeoutMs);
@@ -210,7 +211,7 @@ export class ConnectionManager {
       if (result.success) {
         this.clearRelayBackoff(result.url);
       } else {
-        this.markRelayUnreachable(result.url, 60000, {
+        this.markRelayUnreachable(result.url, LONG_TIMEOUT_MS, {
           reason: "connect-timeout",
         });
         if (isDevMode) {
@@ -367,7 +368,7 @@ export class ConnectionManager {
     return filtered.length;
   }
 
-  markRelayUnreachable(url, ttlMs = 60000, { reason = null } = {}) {
+  markRelayUnreachable(url, ttlMs = LONG_TIMEOUT_MS, { reason = null } = {}) {
     if (!url || typeof url !== "string") {
       return;
     }
@@ -722,7 +723,7 @@ export class ConnectionManager {
         `Failed to connect to relay ${normalizedUrl}`
       );
       connectError.code = "relay-connect-failed";
-      this.markRelayUnreachable(normalizedUrl, 60000, {
+      this.markRelayUnreachable(normalizedUrl, LONG_TIMEOUT_MS, {
         reason: "connect-failed",
       });
       throw connectError;
@@ -733,7 +734,7 @@ export class ConnectionManager {
         `Relay ${normalizedUrl} is unavailable for COUNT requests.`
       );
       relayError.code = "relay-unavailable";
-      this.markRelayUnreachable(normalizedUrl, 60000, {
+      this.markRelayUnreachable(normalizedUrl, LONG_TIMEOUT_MS, {
         reason: "relay-unavailable",
       });
       throw relayError;
@@ -880,7 +881,7 @@ export class ConnectionManager {
             // because it might still be good for subscriptions.
             // We only trip the circuit breaker for hard errors.
             if (!isTimeout) {
-              this.markRelayUnreachable(url, 60000, {
+              this.markRelayUnreachable(url, LONG_TIMEOUT_MS, {
                 reason: "count-error",
               });
             } else if (isDevMode) {
diff --git a/js/nostr/relayConstants.js b/js/nostr/relayConstants.js
index 7701095c..e7f8c572 100644
--- a/js/nostr/relayConstants.js
+++ b/js/nostr/relayConstants.js
@@ -2,14 +2,23 @@
 // Canonical relay timing and circuit-breaker constants.
 // Import from here — do NOT duplicate these values in other modules.
 
-export const RELAY_CONNECT_TIMEOUT_MS = 5000;
+import {
+  SHORT_TIMEOUT_MS,
+  LONG_TIMEOUT_MS,
+  ONE_SECOND_MS,
+  TEN_MINUTES_MS,
+  FIVE_MINUTES_MS,
+  MEDIUM_TIMEOUT_MS,
+} from "../constants.js";
+
+export const RELAY_CONNECT_TIMEOUT_MS = SHORT_TIMEOUT_MS;
 export const RELAY_RECONNECT_BASE_DELAY_MS = 2000;
-export const RELAY_RECONNECT_MAX_DELAY_MS = 60000;
+export const RELAY_RECONNECT_MAX_DELAY_MS = LONG_TIMEOUT_MS;
 export const RELAY_RECONNECT_MAX_ATTEMPTS = 5;
-export const RELAY_BACKOFF_BASE_DELAY_MS = 1000;
+export const RELAY_BACKOFF_BASE_DELAY_MS = ONE_SECOND_MS;
 export const RELAY_BACKOFF_MAX_DELAY_MS = 8000;
 export const RELAY_CIRCUIT_BREAKER_THRESHOLD = 3;
-export const RELAY_CIRCUIT_BREAKER_COOLDOWN_MS = 10 * 60 * 1000;
-export const RELAY_FAILURE_WINDOW_MS = 5 * 60 * 1000;
+export const RELAY_CIRCUIT_BREAKER_COOLDOWN_MS = TEN_MINUTES_MS;
+export const RELAY_FAILURE_WINDOW_MS = FIVE_MINUTES_MS;
 export const RELAY_FAILURE_WINDOW_THRESHOLD = 3;
-export const RELAY_SUMMARY_LOG_INTERVAL_MS = 30000;
+export const RELAY_SUMMARY_LOG_INTERVAL_MS = MEDIUM_TIMEOUT_MS;
diff --git a/js/nostrEventSchemas.js b/js/nostrEventSchemas.js
index 307b6985..93abdd73 100644
--- a/js/nostrEventSchemas.js
+++ b/js/nostrEventSchemas.js
@@ -50,6 +50,8 @@ export const NOTE_TYPES = Object.freeze({
   CHAT_MESSAGE: "chatMessage",
 });
 
+export const KIND_MUTE_LIST = 10000;
+
 export const SUBSCRIPTION_LIST_IDENTIFIER = "subscriptions";
 export const BLOCK_LIST_IDENTIFIER = "user-blocks";
 export const ADMIN_LIST_IDENTIFIERS = Object.freeze({
@@ -540,7 +542,7 @@ const BASE_SCHEMAS = {
   [NOTE_TYPES.USER_BLOCK_LIST]: {
     type: NOTE_TYPES.USER_BLOCK_LIST,
     label: "User block list (legacy)",
-    kind: 10000,
+    kind: KIND_MUTE_LIST,
     identifierTag: {
       name: "d",
       value: BLOCK_LIST_IDENTIFIER,
@@ -616,7 +618,7 @@ const BASE_SCHEMAS = {
   [NOTE_TYPES.MUTE_LIST]: {
     type: NOTE_TYPES.MUTE_LIST,
     label: "Mute list",
-    kind: 10000,
+    kind: KIND_MUTE_LIST,
     participantTagName: "p",
     appendTags: DEFAULT_APPEND_TAGS,
     content: {
@@ -1704,7 +1706,7 @@ export function buildMuteListEvent(params) {
   }
 
   const event = {
-    kind: schema?.kind ?? 10000,
+    kind: schema?.kind ?? KIND_MUTE_LIST,
     pubkey,
     created_at,
     tags,
diff --git a/js/payments/platformAddress.js b/js/payments/platformAddress.js
index 5399ac2f..842ee9be 100644
--- a/js/payments/platformAddress.js
+++ b/js/payments/platformAddress.js
@@ -6,9 +6,10 @@ import { setProfileCacheEntry } from "../state/cache.js";
 import { nostrToolsReady } from "../nostrToolsBootstrap.js";
 import { userLogger } from "../utils/logger.js";
 import { HEX64_REGEX } from "../utils/hex.js";
+import { TEN_MINUTES_MS } from "../constants.js";
 
 
-const CACHE_TTL_MS = 10 * 60 * 1000;
+const CACHE_TTL_MS = TEN_MINUTES_MS;
 
 let cachedAddress = null;
 
diff --git a/js/payments/zapSharedState.js b/js/payments/zapSharedState.js
index 9ac0fef4..833edf53 100644
--- a/js/payments/zapSharedState.js
+++ b/js/payments/zapSharedState.js
@@ -4,8 +4,9 @@ import {
   fetchPayServiceData as defaultFetchPayServiceData,
   validateInvoiceAmount,
 } from "./lnurl.js";
+import { FIVE_MINUTES_MS } from "../constants.js";
 
-const METADATA_CACHE_TTL_MS = 5 * 60 * 1000;
+const METADATA_CACHE_TTL_MS = FIVE_MINUTES_MS;
 
 const lightningMetadataCache = new Map();
 const lightningMetadataByUrl = new Map();
diff --git a/js/services/commentThreadService.js b/js/services/commentThreadService.js
index 6018980d..e361248c 100644
--- a/js/services/commentThreadService.js
+++ b/js/services/commentThreadService.js
@@ -4,7 +4,7 @@ import logger, { devLogger, userLogger } from "../utils/logger.js";
 import { normalizeHexId, normalizeHexPubkey } from "../utils/hex.js";
 import { buildVideoAddressPointer } from "../utils/videoPointer.js";
 import { COMMENT_EVENT_KIND } from "../nostr/commentEvents.js";
-import { FEATURE_IMPROVED_COMMENT_FETCHING } from "../constants.js";
+import { FEATURE_IMPROVED_COMMENT_FETCHING, FIVE_MINUTES_MS } from "../constants.js";
 
 const ROOT_PARENT_KEY = "__root__";
 const DEFAULT_INITIAL_LIMIT = 40;
@@ -12,7 +12,7 @@ const DEFAULT_HYDRATION_DEBOUNCE_MS = 25;
 const PROFILE_FETCH_MAX_ATTEMPTS = 3;
 const PROFILE_FETCH_BACKOFF_MS = 50;
 const COMMENT_CACHE_PREFIX = "bitvid:comments:";
-const COMMENT_CACHE_TTL_MS = 5 * 60 * 1000;
+const COMMENT_CACHE_TTL_MS = FIVE_MINUTES_MS;
 const COMMENT_CACHE_VERSION = 2;
 
 function toPositiveInteger(value, fallback) {
diff --git a/js/services/exploreDataService.js b/js/services/exploreDataService.js
index c8cb38b7..4556b0c3 100644
--- a/js/services/exploreDataService.js
+++ b/js/services/exploreDataService.js
@@ -1,7 +1,8 @@
 import { devLogger } from "../utils/logger.js";
+import { FIVE_MINUTES_MS, ONE_MINUTE_MS } from "../constants.js";
 
-const DEFAULT_IDF_REFRESH_INTERVAL_MS = 5 * 60 * 1000;
-const DEFAULT_HISTORY_REFRESH_INTERVAL_MS = 60 * 1000;
+const DEFAULT_IDF_REFRESH_INTERVAL_MS = FIVE_MINUTES_MS;
+const DEFAULT_HISTORY_REFRESH_INTERVAL_MS = ONE_MINUTE_MS;
 const DEFAULT_REFRESH_DEBOUNCE_MS = 200;
 
 let workerInstance = null;
diff --git a/js/services/moderationService.js b/js/services/moderationService.js
index a90b8844..a5ae291b 100644
--- a/js/services/moderationService.js
+++ b/js/services/moderationService.js
@@ -6,7 +6,7 @@ import {
 import { publishEventToRelays, assertAnyRelayAccepted } from "../nostrPublish.js";
 import { accessControl } from "../accessControl.js";
 import { userBlocks, USER_BLOCK_EVENTS } from "../userBlocks.js";
-import { buildReportEvent } from "../nostrEventSchemas.js";
+import { buildReportEvent, KIND_MUTE_LIST } from "../nostrEventSchemas.js";
 import logger from "../utils/logger.js";
 
 /**
@@ -1182,7 +1182,7 @@ export class ModerationService {
     this.log(`[moderationService] Refreshing mute subscriptions for ${authors.length} authors in ${chunks.length} batches`);
 
     for (const chunk of chunks) {
-      const filter = { kinds: [10000], authors: chunk };
+      const filter = { kinds: [KIND_MUTE_LIST], authors: chunk };
       try {
         const sub = this.nostrClient.pool.sub(relays, [filter]);
         sub.on("event", (event) => {
@@ -1347,7 +1347,7 @@ export class ModerationService {
       return;
     }
 
-    if (!event || event.kind !== 10000) {
+    if (!event || event.kind !== KIND_MUTE_LIST) {
       this.replaceTrustedMuteList(owner, new Set(), { createdAt: 0, eventId: "" });
       return;
     }
@@ -1387,7 +1387,7 @@ export class ModerationService {
   }
 
   ingestTrustedMuteEvent(event) {
-    if (!event || event.kind !== 10000) {
+    if (!event || event.kind !== KIND_MUTE_LIST) {
       return;
     }
 
diff --git a/js/services/relayHealthService.js b/js/services/relayHealthService.js
index 47ae5061..2aacc856 100644
--- a/js/services/relayHealthService.js
+++ b/js/services/relayHealthService.js
@@ -1,9 +1,10 @@
 import { devLogger, userLogger } from "../utils/logger.js";
+import { FIVE_MINUTES_MS, SHORT_TIMEOUT_MS, LONG_TIMEOUT_MS } from "../constants.js";
 
 const TELEMETRY_STORAGE_KEY = "bitvid:relay-health-telemetry-opt-in";
 const PERSISTENT_FAILURE_THRESHOLD = 3;
-const USER_LOG_COOLDOWN_MS = 5 * 60 * 1000;
-const DEFAULT_TIMEOUT_MS = 5000;
+const USER_LOG_COOLDOWN_MS = FIVE_MINUTES_MS;
+const DEFAULT_TIMEOUT_MS = SHORT_TIMEOUT_MS;
 
 function resolveLogger(logger) {
   if (logger && logger.dev && logger.user) {
@@ -154,7 +155,7 @@ class RelayHealthService {
     state.lastErrorAt = now;
 
     if (this.nostrClient && typeof this.nostrClient.markRelayUnreachable === "function") {
-      this.nostrClient.markRelayUnreachable(relayUrl, 60000, {
+      this.nostrClient.markRelayUnreachable(relayUrl, LONG_TIMEOUT_MS, {
         reason: "relay-health-failed",
       });
     }
diff --git a/js/state/cache.js b/js/state/cache.js
index b399633c..2fca6225 100644
--- a/js/state/cache.js
+++ b/js/state/cache.js
@@ -5,6 +5,10 @@ import {
   DEFAULT_TRUSTED_SPAM_HIDE_THRESHOLD,
   getTrustedMuteHideThreshold,
   getTrustedSpamHideThreshold,
+  PROFILE_CACHE_TTL_MS,
+  URL_HEALTH_TTL_MS,
+  URL_HEALTH_RETRY_MS,
+  URL_PROBE_TIMEOUT_MS,
 } from "../constants.js";
 import { userLogger } from "../utils/logger.js";
 import { sanitizeProfileMediaUrl } from "../utils/profileMedia.js";
@@ -17,14 +21,12 @@ import createProfileSettingsStore from "./profileSettingsStore.js";
 
 const PROFILE_CACHE_STORAGE_KEY = "bitvid:profileCache:v1";
 const PROFILE_CACHE_VERSION = 1;
-const PROFILE_CACHE_TTL_MS = 10 * 60 * 1000; // 10 minutes
 
 const SAVED_PROFILES_STORAGE_KEY = "bitvid:savedProfiles:v1";
 const SAVED_PROFILES_STORAGE_VERSION = 1;
 
-const URL_HEALTH_TTL_MS = 45 * 60 * 1000; // 45 minutes
-const URL_HEALTH_TIMEOUT_RETRY_MS = 5 * 60 * 1000; // 5 minutes
-export const URL_PROBE_TIMEOUT_MS = 8 * 1000; // 8 seconds
+const URL_HEALTH_TIMEOUT_RETRY_MS = URL_HEALTH_RETRY_MS;
+export { URL_PROBE_TIMEOUT_MS };
 const URL_PROBE_TIMEOUT_RETRY_MS = 15 * 1000; // 15 seconds
 
 
diff --git a/js/userBlocks.js b/js/userBlocks.js
index 83723837..fa458cfa 100644
--- a/js/userBlocks.js
+++ b/js/userBlocks.js
@@ -10,9 +10,11 @@ import {
   buildBlockListEvent,
   buildMuteListEvent,
   BLOCK_LIST_IDENTIFIER,
+  KIND_MUTE_LIST,
 } from "./nostrEventSchemas.js";
 import { CACHE_POLICIES, STORAGE_TIERS } from "./nostr/cachePolicies.js";
 import { devLogger, userLogger } from "./utils/logger.js";
+import { STANDARD_TIMEOUT_MS } from "./constants.js";
 import {
   publishEventToRelays,
   assertAnyRelayAccepted,
@@ -86,7 +88,7 @@ const BACKGROUND_BLOCKLIST_TIMEOUT_MS = 6000;
 // 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 = 10000;
+const DECRYPT_TIMEOUT_MS = STANDARD_TIMEOUT_MS;
 const BACKGROUND_DECRYPT_TIMEOUT_MS = 8000;
 // PERF: Reduced from 10s to 3s for faster recovery during login.
 const DECRYPT_RETRY_DELAY_MS = 3000;
@@ -420,7 +422,7 @@ function isUserBlockListEvent(event) {
     return false;
   }
 
-  if (event.kind === 10000) {
+  if (event.kind === KIND_MUTE_LIST) {
     return true;
   }
 
@@ -755,7 +757,7 @@ class UserBlockListManager {
     this.blockListSubscriptionKey = key;
 
     const filters = [
-      { kinds: [10000], authors: [normalized] },
+      { kinds: [KIND_MUTE_LIST], authors: [normalized] },
       { kinds: [30002], authors: [normalized], "#d": [BLOCK_LIST_IDENTIFIER] },
     ];
 
@@ -1261,7 +1263,7 @@ class UserBlockListManager {
 
         // Standard Mute: Kind 10000 WITHOUT d=user-blocks
         const standardMuteEvents = validEvents
-          .filter((e) => e.kind === 10000 && !isTaggedBlockListEvent(e))
+          .filter((e) => e.kind === KIND_MUTE_LIST && !isTaggedBlockListEvent(e))
           .sort((a, b) => (b?.created_at || 0) - (a?.created_at || 0));
 
         const newestLegacy = legacyBlockEvents[0] || null;
@@ -1549,7 +1551,7 @@ class UserBlockListManager {
       // Legacy variants are fetched in parallel but processed separately to avoid blocking.
 
       const standardFetchPromise = nostrClient.fetchListIncrementally({
-        kind: 10000,
+        kind: KIND_MUTE_LIST,
         pubkey: normalized,
         relayUrls: relays,
         since: fetchSince,
@@ -1558,7 +1560,7 @@ class UserBlockListManager {
 
       const legacyFetchPromise = Promise.all([
         nostrClient.fetchListIncrementally({
-          kind: 10000,
+          kind: KIND_MUTE_LIST,
           pubkey: normalized,
           dTag: BLOCK_LIST_IDENTIFIER,
           relayUrls: relays,
diff --git a/js/watchHistoryService.js b/js/watchHistoryService.js
index cfecf734..8d5e750a 100644
--- a/js/watchHistoryService.js
+++ b/js/watchHistoryService.js
@@ -16,10 +16,11 @@ import {
 } from "./config.js";
 import { getApplication } from "./applicationContext.js";
 import { devLogger, userLogger } from "./utils/logger.js";
+import { ONE_MINUTE_MS } from "./constants.js";
 
 const LOCAL_STORAGE_QUEUE_KEY = "bitvid:watch-history:queue:v1";
 const SESSION_STORAGE_VERSION = 1;
-const POINTER_THROTTLE_MS = 60 * 1000;
+const POINTER_THROTTLE_MS = ONE_MINUTE_MS;
 const state = {
   restored: false,
   queues: new Map(),