all settings sync

src/background.ts

@@ -1,6 +1,8 @@
 import browser from "webextension-polyfill";
 import semver from "semver";
 import type { SettingsState } from "@/types/storage";
+import { getDefaultSettingsState } from "@/seqta/utils/defaultSettings";
+import { ensureSyncableStorageDefaults } from "@/seqta/utils/ensureSyncableStorageDefaults";
 import { fetchNews } from "./background/news";
 import {
   initCloudSettingsAutoSync,
@@ -404,6 +406,15 @@ const MESSAGE_HANDLERS: Record<string, MessageHandler> = {
     void browser.tabs.create({ url: "github.com/BetterSEQTA/BetterSEQTA-Plus" });
   },
   setDefaultStorage: () => SetStorageValue(getDefaultValues()),
+  ensureStorageDefaults: (_req, sendResponse) => {
+    void ensureSyncableStorageDefaults()
+      .then(() => sendResponse({ ok: true }))
+      .catch((e) => {
+        console.warn("[BetterSEQTA+] ensureStorageDefaults failed:", e);
+        sendResponse({ ok: false });
+      });
+    return true;
+  },
   sendNews: (req, sendResponse) => {
     fetchNews(req.source ?? "australia", sendResponse);
     return true;
@@ -477,76 +488,8 @@ browser.runtime.onMessage.addListener(
   },
 );
 
-function detectLowEndDevice(): boolean {
-  // Check for low-end hardware indicators
-  const lowCoreCount = navigator.hardwareConcurrency && navigator.hardwareConcurrency < 4;
-  const lowMemory = (navigator as any).deviceMemory && (navigator as any).deviceMemory <= 2;
-  
-  return lowCoreCount || lowMemory;
-}
-
 function getDefaultValues(): SettingsState {
-  const isLowEndDevice = detectLowEndDevice();
+  return getDefaultSettingsState();
-
-  return {
-    onoff: true,
-    animatedbk: true,
-    bksliderinput: "50",
-    transparencyEffects: false,
-    lessonalert: true,
-    defaultmenuorder: [],
-    menuitems: {
-      assessments: { toggle: true },
-      courses: { toggle: true },
-      dashboard: { toggle: true },
-      documents: { toggle: true },
-      forums: { toggle: true },
-      goals: { toggle: true },
-      home: { toggle: true },
-      messages: { toggle: true },
-      myed: { toggle: true },
-      news: { toggle: true },
-      notices: { toggle: true },
-      portals: { toggle: true },
-      reports: { toggle: true },
-      settings: { toggle: true },
-      timetable: { toggle: true },
-      welcome: { toggle: true },
-    },
-    menuorder: [],
-    subjectfilters: {},
-    selectedTheme: "",
-    selectedColor:
-      "linear-gradient(40deg, rgba(201,61,0,1) 0%, RGBA(170, 5, 58, 1) 100%)",
-    originalSelectedColor: "",
-    DarkMode: true,
-    animations: !isLowEndDevice,
-    assessmentsAverage: false,
-    defaultPage: "home",
-    shortcuts: [
-      {
-        name: "Outlook",
-        enabled: true,
-      },
-      {
-        name: "Office",
-        enabled: true,
-      },
-      {
-        name: "Google",
-        enabled: true,
-      },
-    ],
-    customshortcuts: [],
-    lettergrade: false,
-    newsSource: "australia",
-    iconOnlySidebar: false,
-    adaptiveThemeColour: false,
-    adaptiveThemeGradient: false,
-    adaptiveThemeColourTransition: true,
-    themeOfTheMonthDisabled: false,
-    autoCloudSettingsSync: true,
-  };
 }
 
 function SetStorageValue(object: any) {
@@ -673,6 +616,8 @@ browser.runtime.onInstalled.addListener(function (event) {
   browser.storage.local.remove(["justupdated"]);
   browser.storage.local.remove(["data"]);
 
+  void ensureSyncableStorageDefaults();
+
   if (event.reason == "install" || event.reason == "update") {
     browser.storage.local.set({ justupdated: true });
   }
@@ -684,4 +629,9 @@ browser.runtime.onInstalled.addListener(function (event) {
   }
 });
 
+browser.runtime.onStartup.addListener(() => {
+  void ensureSyncableStorageDefaults();
+});
+
 initCloudSettingsAutoSync({ reloadSeqtaPages });
+void ensureSyncableStorageDefaults();

src/css/injected/popup.scss

@@ -18,7 +18,7 @@
   right: 10px;
   top: 80px;
   height: 590px;
-  z-index: 20;
+  z-index: 100;
   transition-duration: 100ms;
 }
 

src/interface/pages/settings/shortcuts.svelte

@@ -24,18 +24,18 @@
   });
 
   const switchChange = (shortcut: any) => {
-    const idx = $settingsState.shortcuts.findIndex(s => s.name === shortcut);
+    const current = settingsState.shortcuts ?? [];
+    const idx = current.findIndex(s => s.name === shortcut);
     if (idx !== -1) {
-      // Create a new array with the toggled value to ensure reactivity
+      const updated = current.map(s =>
-      const updated = settingsState.shortcuts.map(s =>
         s.name === shortcut ? { ...s, enabled: !s.enabled } : s
       );
-      settingsState.shortcuts = updated;
+      settingsState.setKey("shortcuts", updated);
     } else {
-      settingsState.shortcuts = [
+      settingsState.setKey("shortcuts", [
-        ...settingsState.shortcuts,
+        ...current,
-        { name: shortcut, enabled: true }
+        { name: shortcut, enabled: true },
-      ];
+      ]);
     }
   }
 
@@ -82,7 +82,10 @@
     if (isValidTitle(newTitle) && isValidURL(newURL)) {
       const icon = newIcon || newTitle[0];
       const newShortcut = { name: newTitle.trim(), url: formatUrl(newURL).trim(), icon };
-      settingsState.customshortcuts = [...settingsState.customshortcuts, newShortcut];
+      settingsState.setKey("customshortcuts", [
+        ...(settingsState.customshortcuts ?? []),
+        newShortcut,
+      ]);
 
       newTitle = "";
       newURL = "";
@@ -94,7 +97,10 @@
   };
 
   const deleteCustomShortcut = (index: number) => {
-    settingsState.customshortcuts = settingsState.customshortcuts.filter((_, i) => i !== index);
+    settingsState.setKey(
+      "customshortcuts",
+      (settingsState.customshortcuts ?? []).filter((_, i) => i !== index),
+    );
   };
 </script>
 
@@ -203,7 +209,7 @@
     </div>
 
     <!-- Custom Shortcuts Section -->
-    {#each $settingsState.customshortcuts as shortcut, index}
+    {#each ($settingsState.customshortcuts ?? []) as shortcut, index}
       <div class="flex justify-between items-center px-4 py-3">
         {shortcut.name}
         <button aria-label="Delete Shortcut" onclick={() => deleteCustomShortcut(index)}>

src/plugins/built-in/gradeAnalytics/AnalyticsAreaChart.svelte

@@ -156,7 +156,7 @@
 
 <article class="bsplus-analytics-card">
 
-  <header class="bsplus-analytics-card-header">
+  <header class="bsplus-analytics-card-header bsplus-analytics-card-header-split">
 
     <div>
 
@@ -178,6 +178,12 @@
 
     </div>
 
+    <div class="bsplus-analytics-card-controls" aria-hidden="true">
+
+      <div class="bsplus-analytics-card-control bsplus-analytics-card-control-spacer"></div>
+
+    </div>
+
   </header>
 
 
@@ -346,31 +352,33 @@
 
   <footer class="bsplus-analytics-card-footer">
 
-    {#if trend().direction === "up"}
+    <p>
 
-      <span class="bsplus-analytics-trend-up"
+      {#if trend().direction === "up"}
 
-        >Trending up · {trend().percentage}% vs previous period</span
+        <span class="bsplus-analytics-trend-up"
 
-      >
+          >Trending up · {trend().percentage}% vs previous period</span
 
-    {:else if trend().direction === "down"}
+        >
 
-      <span class="bsplus-analytics-trend-down"
+      {:else if trend().direction === "down"}
 
-        >Trending down · {trend().percentage}% vs previous period</span
+        <span class="bsplus-analytics-trend-down"
 
-      >
+          >Trending down · {trend().percentage}% vs previous period</span
 
-    {:else}
+        >
 
-      <span>Grades remain stable across this period</span>
+      {:else}
 
-    {/if}
+        <span>Grades remain stable across this period</span>
 
-    <br />
+      {/if}
 
-    <span>
+    </p>
+
+    <p>
 
       {filteredData().length} data points · {getTimeRangeLabel(timeRange)}
 
@@ -380,7 +388,7 @@
 
       {/if}
 
-    </span>
+    </p>
 
   </footer>
 

src/plugins/built-in/gradeAnalytics/AnalyticsBarChart.svelte

@@ -356,12 +356,6 @@
 
       </Chart.Container>
 
-      {#if distribution().modeUsed === "letter"}
-
-        <p class="bsplus-analytics-scale-hint">{distribution().scaleLabel}</p>
-
-      {/if}
-
     {:else}
 
       <div class="bsplus-analytics-card-empty">
@@ -380,27 +374,37 @@
 
   <footer class="bsplus-analytics-card-footer">
 
-    {#if distribution().averagePercent !== null}
+    {#if distribution().modeUsed === "letter" && distribution().scaleLabel}
 
-      Average <strong>{distribution().averagePercent}%</strong>
+      <p class="bsplus-analytics-scale-hint">{distribution().scaleLabel}</p>
-
-    {:else}
-
-      Average <strong>—</strong>
 
     {/if}
 
-    across {totalAssessments} assessment{totalAssessments === 1 ? "" : "s"}
+    <p>
 
-    {#if distributionMode === "auto" && distribution().modeUsed === "letter"}
+      {#if distribution().averagePercent !== null}
 
-      <span class="bsplus-analytics-footer-muted"> · letter scale detected</span>
+        Average <strong>{distribution().averagePercent}%</strong>
 
-    {:else if distributionMode !== "auto"}
+      {:else}
 
-      <span class="bsplus-analytics-footer-muted"> · {modeOptionLabel} grouping</span>
+        Average <strong>—</strong>
 
-    {/if}
+      {/if}
+
+      across {totalAssessments} assessment{totalAssessments === 1 ? "" : "s"}
+
+      {#if distributionMode === "auto" && distribution().modeUsed === "letter"}
+
+        <span class="bsplus-analytics-footer-muted"> · letter scale detected</span>
+
+      {:else if distributionMode !== "auto"}
+
+        <span class="bsplus-analytics-footer-muted"> · {modeOptionLabel} grouping</span>
+
+      {/if}
+
+    </p>
 
   </footer>
 

src/plugins/built-in/gradeAnalytics/styles.css

@@ -33,6 +33,7 @@
   --bsplus-analytics-shadow-hover: 0 8px 24px 8px rgba(0, 0, 0, 0.16);
   /* Set on host via ui.ts from --better-main / user selectedColor */
   --bsplus-analytics-accent: var(--better-main, #007bff);
+  --bsplus-analytics-chart-height: 300px;
 
   width: 100%;
   max-width: none;
@@ -342,13 +343,12 @@
   backdrop-filter: var(--bsplus-theme-card-blur, none);
   overflow: visible;
   position: relative;
-  z-index: 40;
+  z-index: 3;
-  isolation: isolate;
 }
 
 .bsplus-analytics-toolbar-dropdown-field {
   position: relative;
-  z-index: 2;
+  z-index: 4;
 }
 
 .bsplus-analytics-field {
@@ -541,7 +541,7 @@
   position: absolute;
   left: 0;
   top: calc(100% + 0.35rem);
-  z-index: 100;
+  z-index: 5;
   min-width: 14rem;
   max-height: 12rem;
   overflow-y: auto;
@@ -601,11 +601,19 @@
   width: 100%;
   position: relative;
   z-index: 1;
+  align-items: stretch;
 }
 
 /* Fade-in animation must not paint above the filter toolbar / dropdown */
-.bsplus-analytics-charts .bsplus-analytics-animate {
+.bsplus-analytics-charts > .bsplus-analytics-animate {
   z-index: 1;
+  display: flex;
+  min-width: 0;
+}
+
+.bsplus-analytics-charts > .bsplus-analytics-animate > .bsplus-analytics-card {
+  flex: 1;
+  width: 100%;
 }
 
 @media (min-width: 960px) {
@@ -613,11 +621,18 @@
     grid-template-columns: 1fr 1fr;
     gap: 1.5rem;
   }
+
+  .bsplus-analytics-charts .bsplus-analytics-card-header {
+    min-height: 5.75rem;
+    box-sizing: border-box;
+    align-items: flex-end;
+  }
 }
 
 .bsplus-analytics-card {
   display: flex;
   flex-direction: column;
+  height: 100%;
   border-radius: var(
     --bsplus-theme-card-radius,
     var(--bsplus-analytics-radius)
@@ -669,6 +684,12 @@
   min-width: 9.5rem;
 }
 
+.bsplus-analytics-card-control-spacer {
+  visibility: hidden;
+  pointer-events: none;
+  min-height: 2.5rem;
+}
+
 .bsplus-analytics-select-compact {
   min-width: 9.5rem;
   min-height: 2.5rem;
@@ -678,7 +699,7 @@
 }
 
 .bsplus-analytics-scale-hint {
-  margin: 0.65rem 0 0;
+  margin: 0;
   font-size: 0.75rem;
   line-height: 1.4;
   color: var(--bsplus-analytics-muted);
@@ -705,15 +726,35 @@
 .bsplus-analytics-card-body {
   padding: 1rem 1.15rem;
   flex: 1;
+  display: flex;
+  flex-direction: column;
   background: var(--bsplus-analytics-surface);
 }
 
+.bsplus-analytics-charts .bsplus-analytics-card-body {
+  justify-content: center;
+}
+
 .bsplus-analytics-card-footer {
   padding: 0.85rem 1.25rem 1.1rem;
   border-top: 1px solid var(--bsplus-analytics-border);
   font-size: 0.8125rem;
   color: var(--bsplus-analytics-muted);
   line-height: 1.5;
+  margin-top: auto;
+}
+
+.bsplus-analytics-charts .bsplus-analytics-card-footer {
+  min-height: 4.25rem;
+  box-sizing: border-box;
+}
+
+.bsplus-analytics-card-footer p {
+  margin: 0;
+}
+
+.bsplus-analytics-card-footer p + p {
+  margin-top: 0.35rem;
 }
 
 .bsplus-analytics-card-empty {
@@ -721,10 +762,12 @@
   flex-direction: column;
   align-items: center;
   justify-content: center;
-  min-height: 220px;
+  min-height: var(--bsplus-analytics-chart-height, 300px);
+  height: var(--bsplus-analytics-chart-height, 300px);
   text-align: center;
   gap: 0.35rem;
   color: var(--bsplus-analytics-muted);
+  flex-shrink: 0;
 }
 
 .bsplus-analytics-card-empty strong {
@@ -741,16 +784,12 @@
   color: var(--bsplus-analytics-muted);
 }
 
-.bsplus-analytics-root .bsplus-chart-surface {
+.bsplus-analytics-root .bsplus-chart-surface,
-  height: 280px;
-  min-height: 280px;
-  max-height: 280px;
-}
-
 .bsplus-analytics-root .bsplus-chart-surface-bar {
-  height: 320px;
+  height: var(--bsplus-analytics-chart-height);
-  min-height: 320px;
+  min-height: var(--bsplus-analytics-chart-height);
-  max-height: 320px;
+  max-height: var(--bsplus-analytics-chart-height);
+  flex-shrink: 0;
 }
 
 /* Bar chart: show axis spines and tick marks (area chart hides these) */

src/plugins/built-in/gradeAnalytics/ui.ts

@@ -23,6 +23,25 @@ let darkModeObserver: MutationObserver | null = null;
 let themeStyleObserver: MutationObserver | null = null;
 let themeListeners: ThemeListenerRegistration[] = [];
 
+const ANALYTICS_STACKING_STYLE_ID = "bsplus-analytics-stacking-styles";
+
+/** Light-DOM stacking scope so toolbar/dropdown z-index cannot paint over ExtensionPopup. */
+function ensureAnalyticsStackingScope() {
+  if (document.getElementById(ANALYTICS_STACKING_STYLE_ID)) return;
+  const style = document.createElement("style");
+  style.id = ANALYTICS_STACKING_STYLE_ID;
+  style.textContent = `
+    #analytics-view-container,
+    .bsplus-analytics-container,
+    .bsplus-analytics-host {
+      position: relative;
+      z-index: 0;
+      isolation: isolate;
+    }
+  `;
+  document.head.appendChild(style);
+}
+
 const THEME_CSS_VARS = [
   "--better-main",
   "--better-pale",
@@ -161,6 +180,8 @@ function teardown() {
 export function renderAnalyticsPage(container: HTMLElement) {
   teardown();
 
+  ensureAnalyticsStackingScope();
+
   container.innerHTML = "";
   container.className = "bsplus-analytics-container";
 

src/seqta/utils/cloudSettingsSync.ts

@@ -190,7 +190,7 @@ export async function setKnownRemoteUpdatedAt(iso: string | undefined): Promise<
  * Only applies migrations for keys present in the data; does not overwrite
  * existing plugin settings if the legacy key is absent.
  */
-function migrateLegacyToPluginSettings(data: Record<string, unknown>): Record<string, unknown> {
+export function migrateLegacyToPluginSettings(data: Record<string, unknown>): Record<string, unknown> {
   const result = { ...data };
 
   function ensurePluginSettings(pluginId: string): Record<string, unknown> {

src/seqta/utils/defaultSettings.ts

@@ -0,0 +1,73 @@
+import type { SettingsState } from "@/types/storage";
+
+function detectLowEndDevice(): boolean {
+  const lowCoreCount =
+    navigator.hardwareConcurrency && navigator.hardwareConcurrency < 4;
+  const lowMemory =
+    (navigator as Navigator & { deviceMemory?: number }).deviceMemory != null &&
+    (navigator as Navigator & { deviceMemory?: number }).deviceMemory! <= 2;
+
+  return !!(lowCoreCount || lowMemory);
+}
+
+/** Default core settings for a fresh profile (`SettingsState` shape). */
+export function getDefaultSettingsState(): SettingsState {
+  const isLowEndDevice = detectLowEndDevice();
+
+  return {
+    onoff: true,
+    animatedbk: true,
+    bksliderinput: "50",
+    transparencyEffects: false,
+    lessonalert: true,
+    defaultmenuorder: [],
+    menuitems: {
+      assessments: { toggle: true },
+      courses: { toggle: true },
+      dashboard: { toggle: true },
+      documents: { toggle: true },
+      forums: { toggle: true },
+      goals: { toggle: true },
+      home: { toggle: true },
+      messages: { toggle: true },
+      myed: { toggle: true },
+      news: { toggle: true },
+      notices: { toggle: true },
+      portals: { toggle: true },
+      reports: { toggle: true },
+      settings: { toggle: true },
+      timetable: { toggle: true },
+      welcome: { toggle: true },
+    },
+    menuorder: [],
+    subjectfilters: {},
+    selectedTheme: "",
+    selectedColor:
+      "linear-gradient(40deg, rgba(201,61,0,1) 0%, RGBA(170, 5, 58, 1) 100%)",
+    originalSelectedColor: "",
+    DarkMode: true,
+    animations: !isLowEndDevice,
+    assessmentsAverage: false,
+    defaultPage: "home",
+    shortcuts: [
+      { name: "Outlook", enabled: true },
+      { name: "Office", enabled: true },
+      { name: "Google", enabled: true },
+    ],
+    customshortcuts: [],
+    lettergrade: false,
+    notificationCollector: false,
+    newsSource: "australia",
+    iconOnlySidebar: false,
+    adaptiveThemeColour: false,
+    adaptiveThemeGradient: false,
+    adaptiveThemeColourTransition: true,
+    themeOfTheMonthDisabled: false,
+    autoCloudSettingsSync: true,
+    selectedFont: "rubik",
+    timeFormat: "24",
+    privacyStatementShown: false,
+    engageParentsAnnouncementShown: false,
+    bsCloudAutoSyncAnnouncementShown: false,
+  };
+}

src/seqta/utils/ensureSyncableStorageDefaults.ts

@@ -0,0 +1,116 @@
+import browser from "webextension-polyfill";
+import { getAllPluginSettings } from "@/plugins";
+import { getDefaultSettingsState } from "@/seqta/utils/defaultSettings";
+import {
+  isKeyIncludedInCloudUploadPayload,
+  migrateLegacyToPluginSettings,
+} from "@/seqta/utils/cloudSettingsSync";
+
+/** Legacy top-level keys — never backfill; use `migrateLegacyToPluginSettings` instead. */
+const LEGACY_STORAGE_KEYS = [
+  "animatedbk",
+  "bksliderinput",
+  "assessmentsAverage",
+  "lettergrade",
+  "notificationCollector",
+] as const;
+
+/**
+ * Keys where `undefined` in storage is intentional and must not be replaced by a
+ * default (differs from the value we would write).
+ */
+const OPTIONAL_UNSET_MEANS_DEFAULT_KEYS = [
+  "timeFormat",
+  "selectedFont",
+  "privacyStatementShown",
+  "privacyStatementLastUpdated",
+  "engageParentsAnnouncementShown",
+  "bsCloudAutoSyncAnnouncementShown",
+  "themeOfTheMonthDismissedMonth",
+  "themeOfTheMonthLastSeenId",
+  "justupdated",
+  "devMode",
+  "hideSensitiveContent",
+  "mockNotices",
+  "devGhReleaseVersionOverride",
+  "lastSeenNightlyPublishedAt",
+  "originalDarkMode",
+  "profile_picture_revision",
+] as const;
+
+function buildDefaultPluginSettings(
+  plugin: ReturnType<typeof getAllPluginSettings>[number],
+): Record<string, unknown> {
+  const out: Record<string, unknown> = {};
+  for (const [key, setting] of Object.entries(plugin.settings)) {
+    const meta = setting as { type?: string; default?: unknown };
+    if (meta.type === "component" || meta.type === "button") continue;
+    out[key] = meta.default;
+  }
+  return out;
+}
+
+/**
+ * Flat default map in upload shape (plugin-format only; no legacy keys).
+ */
+export function getSyncableStorageDefaults(): Record<string, unknown> {
+  const flat: Record<string, unknown> = {
+    ...getDefaultSettingsState(),
+  };
+
+  for (const key of LEGACY_STORAGE_KEYS) {
+    delete flat[key];
+  }
+  for (const key of OPTIONAL_UNSET_MEANS_DEFAULT_KEYS) {
+    delete flat[key];
+  }
+
+  for (const plugin of getAllPluginSettings()) {
+    flat[`plugin.${plugin.pluginId}.settings`] =
+      buildDefaultPluginSettings(plugin);
+  }
+
+  return flat;
+}
+
+function mergePluginSettingsDefaults(
+  defaults: Record<string, unknown>,
+  fromLegacy: unknown,
+): Record<string, unknown> {
+  if (!fromLegacy || typeof fromLegacy !== "object" || Array.isArray(fromLegacy)) {
+    return defaults;
+  }
+  return { ...defaults, ...(fromLegacy as Record<string, unknown>) };
+}
+
+/**
+ * Writes any missing cloud-syncable keys so uploads contain a full schema.
+ * Never overwrites existing values. Missing plugin settings respect legacy keys.
+ */
+export async function ensureSyncableStorageDefaults(): Promise<void> {
+  const existing = await browser.storage.local.get();
+  const migratedFromExisting = migrateLegacyToPluginSettings({
+    ...existing,
+  });
+  const defaults = getSyncableStorageDefaults();
+
+  const patch: Record<string, unknown> = {};
+  for (const [key, value] of Object.entries(defaults)) {
+    if (!isKeyIncludedInCloudUploadPayload(key)) continue;
+    if (Object.prototype.hasOwnProperty.call(existing, key)) continue;
+
+    if (key.startsWith("plugin.") && key.endsWith(".settings")) {
+      patch[key] = mergePluginSettingsDefaults(
+        value as Record<string, unknown>,
+        migratedFromExisting[key],
+      );
+      continue;
+    }
+
+    patch[key] = value;
+  }
+
+  if (Object.keys(patch).length > 0) {
+    await browser.storage.local.set(patch);
+  }
+}

src/seqta/utils/listeners/SettingsState.ts

@@ -13,6 +13,7 @@ class StorageManager {
   private subscribers: Set<Subscriber<SettingsState>> = new Set();
   private saveTimeout: NodeJS.Timeout | null = null;
   private initialized = false;
+  private bootstrapping = false;
 
   private constructor() {
     this.data = {} as SettingsState;
@@ -33,7 +34,8 @@ class StorageManager {
         // Only save if the reference actually changed
         if (oldValue !== value) {
           Reflect.set(target.data, prop, value);
-          target.saveToStorage();
+          void target.saveToStorage([prop as string]);
+          target.notifySettingChange(prop as string, value, oldValue);
         }
         return true;
       },
@@ -68,8 +70,23 @@ class StorageManager {
   public static async initialize(): Promise<StorageManager & SettingsState> {
     const instance = StorageManager.getInstance();
     if (!instance.initialized) {
-      await instance.loadFromStorage();
+      instance.bootstrapping = true;
-      instance.initialized = true;
+      try {
+        // Must run in the service worker — dynamic import() in content scripts
+        // resolves chunk URLs against the SEQTA page origin on Firefox.
+        try {
+          await browser.runtime.sendMessage({ type: "ensureStorageDefaults" });
+        } catch (e) {
+          console.warn(
+            "[BetterSEQTA+] ensureStorageDefaults message failed:",
+            e,
+          );
+        }
+        await instance.loadFromStorage();
+        instance.initialized = true;
+      } finally {
+        instance.bootstrapping = false;
+      }
     }
     return instance;
   }
@@ -81,16 +98,24 @@ class StorageManager {
     const oldValue = this.data[key];
     if (oldValue !== value) {
       this.data[key] = value;
-      this.saveToStorage();
+      void this.saveToStorage([key as string]);
+      this.notifySettingChange(key as string, value, oldValue);
+    }
+  }
 
-      // Notify listeners
+  private notifySettingChange(
-      const listeners = this.listeners.get(key as string);
+    key: string,
-      if (listeners) {
+    newValue: unknown,
-        for (const listener of listeners) {
+    oldValue: unknown,
-          listener(value, oldValue);
+  ): void {
-        }
+    if (this.bootstrapping) return;
+    const listeners = this.listeners.get(key);
+    if (listeners) {
+      for (const listener of listeners) {
+        listener(newValue, oldValue);
       }
     }
+    this.notifySubscribers();
   }
 
   private async loadFromStorage(): Promise<void> {
@@ -100,14 +125,30 @@ class StorageManager {
     });
   }
   
-  public async saveToStorage(): Promise<void> {
+  public async saveToStorage(changedKeys?: string[]): Promise<void> {
     if (this.saveTimeout) {
       clearTimeout(this.saveTimeout);
       this.saveTimeout = null;
     }
-    // @ts-expect-error
+    const payload: Record<string, unknown> = {};
-    await browser.storage.local.set(this.data);
+    const keys =
-    this.notifySubscribers();
+      changedKeys && changedKeys.length > 0
+        ? changedKeys
+        : Object.keys(this.data);
+
+    for (const key of keys) {
+      const value = (this.data as Record<string, unknown>)[key];
+      if (value !== undefined) {
+        payload[key] = value;
+      }
+    }
+
+    if (Object.keys(payload).length === 0) return;
+
+    await browser.storage.local.set(payload);
+    if (!this.bootstrapping) {
+      this.notifySubscribers();
+    }
   }
 
   private async removeFromStorage(key: string): Promise<void> {
@@ -116,39 +157,46 @@ class StorageManager {
 
   private initStorageListener(): void {
     browser.storage.onChanged.addListener((changes, areaName) => {
-      if (areaName === "local") {
+      if (areaName !== "local") return;
-        const actualChanges: string[] = [];
+
-        
+      const actualChanges: string[] = [];
-        for (const [key, { oldValue, newValue }] of Object.entries(changes)) {
+
-          // Only process if value actually changed
+      for (const [key, { oldValue, newValue }] of Object.entries(changes)) {
-          if (JSON.stringify(oldValue) !== JSON.stringify(newValue)) {
+        if (JSON.stringify(oldValue) === JSON.stringify(newValue)) continue;
-            if (newValue !== undefined) {
+
-              (this.data as any)[key] = newValue;
+        if (newValue !== undefined) {
-            } else {
+          (this.data as Record<string, unknown>)[key] = newValue;
-              delete (this.data as any)[key];
+        } else {
-            }
+          delete (this.data as Record<string, unknown>)[key];
-            actualChanges.push(key);
+        }
-            
+        actualChanges.push(key);
-            // Notify specific listeners
+
-            const listeners = this.listeners.get(key);
+        if (this.bootstrapping) continue;
-            if (listeners) {
+
-              for (const listener of listeners) {
+        const listeners = this.listeners.get(key);
-                listener(newValue, oldValue);
+        if (listeners) {
-              }
+          for (const listener of listeners) {
-            }
+            listener(newValue, oldValue);
           }
         }
-        
+      }
-        // Only notify global listeners if there were actual changes
+
-        if (actualChanges.length > 0 && this.globalListeners.size > 0) {
+      if (
-          for (const listener of this.globalListeners) {
+        !this.bootstrapping &&
-            for (const key of actualChanges) {
+        actualChanges.length > 0 &&
-              const { oldValue, newValue } = changes[key];
+        this.globalListeners.size > 0
-              listener(newValue, oldValue, key);
+      ) {
-            }
+        for (const listener of this.globalListeners) {
+          for (const key of actualChanges) {
+            const { oldValue, newValue } = changes[key];
+            listener(newValue, oldValue, key);
           }
         }
       }
+
+      if (!this.bootstrapping && actualChanges.length > 0) {
+        this.notifySubscribers();
+      }
     });
   }
 

src/seqta/utils/listeners/StorageChanges.ts

@@ -62,19 +62,15 @@ export class StorageChangeHandler {
     browser.runtime.sendMessage({ type: "reloadTabs" });
   }
 
-  private handleCustomShortcutsChange(
+  private handleCustomShortcutsChange(newValue: CustomShortcut[] | undefined) {
-    newValue: CustomShortcut[],
+    if (!Array.isArray(newValue)) return;
-    oldValue: CustomShortcut[],
-  ) {
-    if (!newValue || !oldValue) return;
     renderShortcuts();
   }
 
   private handleShortcutsChange(
-    newValue: { enabled: boolean; name: string }[],
+    newValue: { enabled: boolean; name: string }[] | undefined,
-    oldValue: { enabled: boolean; name: string }[],
   ) {
-    if (!newValue || !oldValue) return;
+    if (!Array.isArray(newValue)) return;
     renderShortcuts();
   }