diff --git a/apps/desktop/src/components/document/DocumentBrowser.vue b/apps/desktop/src/components/document/DocumentBrowser.vue
index e0e33a13d6..40b1893195 100644
--- a/apps/desktop/src/components/document/DocumentBrowser.vue
+++ b/apps/desktop/src/components/document/DocumentBrowser.vue
@@ -69,6 +69,7 @@ import {
   documentStoreValueForGrid,
 } from "@/lib/app/documentJsonValues";
 import { applyDocumentStoreIdentityPlan, formatMeilisearchDocumentOperationPreview, insertDocumentStoreDocument as insertDocumentStoreDocumentCore } from "@/lib/app/documentStoreSave";
+import { restoreDocumentBrowserState, saveDocumentBrowserState } from "@/lib/tabs/documentBrowserStateCache";
 import RedisJsonEditor from "@/components/redis/RedisJsonEditor.vue";
 import { isLosslessJsonNumber, parseJsonPreservingLargeNumbers } from "@/lib/common/safeJsonFormat";
 import {
@@ -110,12 +111,23 @@ const props = defineProps<{
   collection: string;
   databaseType?: DatabaseType;
   tableMeta?: NonNullable<QueryTab["tableMeta"]>;
+  /** Tab id; query conditions are cached per tab and restored on remount. */
+  stateKey?: string;
 }>();
 
 type JsonRecord = Record<string, unknown>;
 type ViewMode = "document" | "table";
 const DYNAMODB_DEFAULT_EXPORT_ROW_LIMIT = 10_000;
 
+// This component is keyed by tab in ContentArea and unmounted on every tab
+// switch; without restoring from the per-tab cache, coming back to the tab
+// would silently drop the user's filter/sort conditions. Page position only
+// survives for skip-based paging: cursor stores (DynamoDB/Elasticsearch)
+// cannot resume a page without their cursor stacks, and infinite scroll
+// always restarts from the first segment.
+const restoredDocumentBrowserState = props.stateKey ? restoreDocumentBrowserState(props.stateKey) : undefined;
+const restoresSkipBasedPage = !!restoredDocumentBrowserState && !settingsStore.editorSettings.infiniteScroll && (documentStoreProviderFor(props.databaseType).kind === "mongodb" || documentStoreProviderFor(props.databaseType).kind === "meilisearch");
+
 const documents = ref<JsonRecord[]>([]);
 const copyDocuments = ref<JsonRecord[]>([]);
 const gridRows = shallowRef<QueryResult["rows"]>([]);
@@ -135,7 +147,7 @@ const loading = ref(false);
 const documentLoadExecutionId = ref("");
 const documentLoadCancelling = ref(false);
 const documentLoadingElapsedSeconds = ref("0.0");
-const page = ref(0);
+const page = ref(restoresSkipBasedPage ? Math.max(0, Math.trunc(restoredDocumentBrowserState!.page)) : 0);
 const pageSize = ref(normalizeResultPageSize(settingsStore.editorSettings.tableOpenPageSize));
 const selectedIdx = ref<number | null>(null);
 const editJson = ref("");
@@ -155,8 +167,8 @@ const viewMode = computed<ViewMode>({
   get: () => settingsStore.editorSettings.mongoViewMode,
   set: (value) => settingsStore.updateEditorSettings({ mongoViewMode: value }),
 });
-const filterInput = ref("");
-const sortInput = ref("");
+const filterInput = ref(restoredDocumentBrowserState?.filterInput ?? "");
+const sortInput = ref(restoredDocumentBrowserState?.sortInput ?? "");
 const filterInputRef = ref<HTMLTextAreaElement>();
 const sortInputRef = ref<HTMLTextAreaElement>();
 const dataGridRef = ref<InstanceType<typeof DataGrid>>();
@@ -284,8 +296,21 @@ type DocumentGridChanges = {
 const documentFilterBuilderOpen = ref(false);
 const documentFilterFieldPopoverOpen = ref<Record<string, boolean>>({});
 const documentFilterFieldSearch = ref<Record<string, string>>({});
-const documentFilterRules = ref<DocumentFilterRule[]>([]);
-const appliedDocumentFilter = ref<Record<string, unknown> | null>(null);
+const documentFilterRules = ref<DocumentFilterRule[]>(restoredDocumentBrowserState?.documentFilterRules ?? []);
+const appliedDocumentFilter = ref<Record<string, unknown> | null>(restoredDocumentBrowserState?.appliedDocumentFilter ?? null);
+
+function persistDocumentBrowserState() {
+  if (!props.stateKey) return;
+  saveDocumentBrowserState(props.stateKey, {
+    filterInput: filterInput.value,
+    sortInput: sortInput.value,
+    appliedDocumentFilter: appliedDocumentFilter.value,
+    documentFilterRules: documentFilterRules.value,
+    page: page.value,
+  });
+}
+
+watch([filterInput, sortInput, appliedDocumentFilter, documentFilterRules, page], persistDocumentBrowserState, { deep: true });
 const elasticsearchMappingFields = ref<ColumnInfo[]>([]);
 function elasticsearchGridColumnTypesFor(columns: readonly string[]): string[] {
   const mappingTypes = elasticsearchFieldTypes.value;
@@ -2120,6 +2145,7 @@ onMounted(async () => {
   void nextTick(resizeDocumentQueryInputs);
 });
 onBeforeUnmount(() => {
+  persistDocumentBrowserState();
   window.removeEventListener("pointerdown", handleDocumentBrowserPointerDown, true);
   unsubscribeElasticsearchIndexCleared?.();
   unsubscribeElasticsearchIndexCleared = undefined;
diff --git a/apps/desktop/src/components/document/__tests__/DocumentBrowserTabState.spec.ts b/apps/desktop/src/components/document/__tests__/DocumentBrowserTabState.spec.ts
new file mode 100644
index 0000000000..9d8ef13b77
--- /dev/null
+++ b/apps/desktop/src/components/document/__tests__/DocumentBrowserTabState.spec.ts
@@ -0,0 +1,322 @@
+// @vitest-environment happy-dom
+
+import { createApp, defineComponent, h, nextTick, type App } from "vue";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const backend = vi.hoisted(() => ({
+  documentFindDocuments: vi.fn(),
+  documentCountDocuments: vi.fn(),
+  cancelQuery: vi.fn(),
+  ensureConnected: vi.fn(),
+  documentInsertDocument: vi.fn(),
+  documentUpdateDocument: vi.fn(),
+  documentDeleteDocument: vi.fn(),
+  documentSaveMeilisearchBatch: vi.fn(),
+}));
+
+const dataGrid = vi.hoisted(() => ({
+  paginate: undefined as ((offset: number, limit: number) => Promise<void>) | undefined,
+  sort: undefined as ((column: string, columnIndex: number, direction: "asc" | "desc" | null) => void) | undefined,
+  pageOffset: undefined as number | undefined,
+}));
+
+const settings = vi.hoisted(() => ({
+  editorSettings: {
+    pageSize: 2,
+    tableOpenPageSize: 2,
+    infiniteScroll: false,
+    mongoViewMode: "table" as "document" | "table",
+    columnWidthDensity: "standard" as "compact" | "standard" | "comfortable",
+    dataGridRenderMode: "canvas" as "canvas" | "dom",
+    tableFontFamily: "system-ui",
+    tableFontSize: 12,
+    numericColumnRightAlign: true,
+    confirmDangerousSqlExecution: true,
+    exportBatchSize: 2,
+    exportRowLimitEnabled: false,
+    exportRowLimit: 100_000,
+  },
+  updateEditorSettings: vi.fn(),
+}));
+
+vi.mock("vue-i18n", async (importOriginal) => ({
+  ...(await importOriginal<typeof import("vue-i18n")>()),
+  useI18n: () => ({ t: (key: string) => key }),
+}));
+
+vi.mock("@/lib/backend/api", () => ({
+  getColumns: vi.fn(),
+  documentFindDocuments: backend.documentFindDocuments,
+  documentCountDocuments: backend.documentCountDocuments,
+  dynamodbDescribeTable: vi.fn(),
+  cancelQuery: backend.cancelQuery,
+  documentInsertDocument: backend.documentInsertDocument,
+  documentUpdateDocument: backend.documentUpdateDocument,
+  documentDeleteDocument: backend.documentDeleteDocument,
+  documentSaveMeilisearchBatch: backend.documentSaveMeilisearchBatch,
+}));
+
+vi.mock("@/stores/connectionStore", () => ({
+  useConnectionStore: () => ({ ensureConnected: backend.ensureConnected }),
+}));
+
+vi.mock("@/stores/settingsStore", () => ({
+  TABLE_FONT_SIZE_MIN: 8,
+  TABLE_FONT_SIZE_MAX: 16,
+  useSettingsStore: () => settings,
+}));
+
+vi.mock("@/components/grid/DataGrid.vue", () => {
+  return {
+    default: defineComponent({
+      name: "DataGridStub",
+      inheritAttrs: false,
+      props: {
+        result: { type: Object, required: true },
+        pageOffset: { type: Number, required: false },
+        pageLimit: { type: Number, required: false },
+        pageSizePreference: { type: String, required: false },
+      },
+      setup(props, { attrs, expose, slots }) {
+        dataGrid.paginate = attrs.onPaginate as typeof dataGrid.paginate;
+        dataGrid.sort = attrs.onSort as typeof dataGrid.sort;
+        expose({
+          visibleColumnCount: 2,
+          displayableColumnCount: 2,
+          hiddenColumnCount: 0,
+          orderedColumnLayoutOptions: [],
+          filteredColumnLayoutOptions: () => [],
+          toggleColumnVisibility: vi.fn(),
+          showAllColumns: vi.fn(),
+          invertColumnVisibility: vi.fn(),
+          hasCustomColumnOrder: false,
+          moveDisplayableColumn: vi.fn(),
+          resetColumnOrder: vi.fn(),
+          nullColumnsHidden: false,
+          canToggleAllNullColumns: false,
+          allNullColumnCount: 0,
+          toggleAllNullColumns: vi.fn(),
+          multiRowTranspose: false,
+          setMultiRowTranspose: vi.fn(),
+          resetInfiniteScrollState: vi.fn(),
+        });
+        return () => {
+          dataGrid.pageOffset = props.pageOffset;
+          return h("div", [
+            // Rendering the real search-bar slot exposes the filter/sort inputs
+            // the same way the actual grid toolbar does.
+            h("div", slots["search-bar"]?.({ localFilterCount: 0, hasLocalColumnFilters: false, localFilterSummaries: [], clearLocalFilter: () => undefined })),
+            h("div", { "data-testid": "data-grid" }, (props.result as { rows: unknown[] }).rows.length),
+          ]);
+        };
+      },
+    }),
+  };
+});
+
+vi.mock("@/components/redis/RedisJsonEditor.vue", async () => {
+  const { defineComponent, h } = await import("vue");
+  return {
+    default: defineComponent({
+      props: { modelValue: { type: String, required: true } },
+      setup(props) {
+        return () => h("div", {}, props.modelValue);
+      },
+    }),
+  };
+});
+
+vi.mock("@/components/ui/popover", async () => {
+  const { defineComponent, h } = await import("vue");
+  const passthrough = (name: string) =>
+    defineComponent({
+      name,
+      setup(_, { slots }) {
+        return () => h("div", slots.default?.());
+      },
+    });
+  return { Popover: passthrough("PopoverStub"), PopoverTrigger: passthrough("PopoverTriggerStub"), PopoverContent: passthrough("PopoverContentStub") };
+});
+
+vi.mock("@/components/ui/select", async () => {
+  const { defineComponent, h } = await import("vue");
+  const passthrough = (name: string) =>
+    defineComponent({
+      name,
+      setup(_, { slots }) {
+        return () => h("div", slots.default?.());
+      },
+    });
+  return { Select: passthrough("SelectStub"), SelectContent: passthrough("SelectContentStub"), SelectItem: passthrough("SelectItemStub"), SelectTrigger: passthrough("SelectTriggerStub"), SelectValue: passthrough("SelectValueStub") };
+});
+
+import DocumentBrowser from "@/components/document/DocumentBrowser.vue";
+
+let app: App<Element> | null = null;
+let root: HTMLDivElement | null = null;
+
+async function flushUi() {
+  for (let index = 0; index < 4; index++) {
+    await Promise.resolve();
+    await nextTick();
+  }
+}
+
+async function mountBrowser(options: { databaseType?: "mongodb" | "elasticsearch"; stateKey?: string } = {}) {
+  app = createApp(DocumentBrowser, {
+    connectionId: "conn-1",
+    database: "test",
+    collection: "docs",
+    databaseType: options.databaseType ?? "mongodb",
+    stateKey: options.stateKey,
+  });
+  app.mount(root!);
+  await flushUi();
+}
+
+function documentResult(start: number, count: number, total: number, extra: Record<string, unknown> = {}) {
+  return {
+    documents: Array.from({ length: count }, (_, index) => {
+      const id = start + index;
+      return { _id: String(id), name: `row_${id}` };
+    }),
+    total,
+    total_is_exact: true,
+    ...extra,
+  };
+}
+
+function queryTextareas(): HTMLTextAreaElement[] {
+  return [...root!.querySelectorAll("textarea.document-query-input")];
+}
+
+function typeInTextarea(textarea: HTMLTextAreaElement, value: string) {
+  textarea.value = value;
+  textarea.dispatchEvent(new Event("input", { bubbles: true }));
+}
+
+function pressEnter(textarea: HTMLTextAreaElement) {
+  textarea.dispatchEvent(new KeyboardEvent("keydown", { key: "Enter", bubbles: true }));
+}
+
+beforeEach(async () => {
+  vi.stubGlobal("localStorage", {
+    getItem: () => null,
+    setItem: () => undefined,
+    removeItem: () => undefined,
+  });
+  backend.documentFindDocuments.mockReset();
+  backend.documentCountDocuments.mockReset();
+  backend.cancelQuery.mockReset();
+  backend.ensureConnected.mockReset();
+  backend.ensureConnected.mockResolvedValue(undefined);
+  backend.documentCountDocuments.mockResolvedValue(0);
+  backend.documentFindDocuments.mockResolvedValue(documentResult(1, 2, 2));
+  dataGrid.paginate = undefined;
+  dataGrid.sort = undefined;
+  dataGrid.pageOffset = undefined;
+  settings.editorSettings.infiniteScroll = false;
+
+  root = document.createElement("div");
+  document.body.appendChild(root);
+});
+
+afterEach(() => {
+  app?.unmount();
+  root?.remove();
+  app = null;
+  root = null;
+  vi.unstubAllGlobals();
+});
+
+describe("DocumentBrowser tab state (tab switch persistence)", () => {
+  it("restores filter and sort conditions after unmount/remount", async () => {
+    await mountBrowser({ stateKey: "tab-filter-sort" });
+    expect(backend.documentFindDocuments).toHaveBeenCalledTimes(1);
+
+    const [filterTextarea] = queryTextareas();
+    typeInTextarea(filterTextarea, '{"name":"row_1"}');
+    await flushUi();
+    pressEnter(filterTextarea);
+    await flushUi();
+    expect(backend.documentFindDocuments).toHaveBeenCalledTimes(2);
+    expect(backend.documentFindDocuments.mock.calls[1]![5]).toBe(JSON.stringify({ name: "row_1" }));
+
+    dataGrid.sort!("name", 1, "asc");
+    await flushUi();
+    expect(backend.documentFindDocuments.mock.calls[2]![7]).toBe(JSON.stringify({ name: 1 }));
+
+    // Switch away (unmount) and back (remount) — what ContentArea does per tab.
+    app!.unmount();
+    app = null;
+    root!.replaceChildren();
+    await flushUi();
+    await mountBrowser({ stateKey: "tab-filter-sort" });
+
+    expect(backend.documentFindDocuments).toHaveBeenCalledTimes(4);
+    const restoredCall = backend.documentFindDocuments.mock.calls[3]!;
+    expect(restoredCall[5]).toBe(JSON.stringify({ name: "row_1" }));
+    expect(restoredCall[7]).toBe(JSON.stringify({ name: 1 }));
+
+    const [restoredFilter, restoredSort] = queryTextareas();
+    expect(restoredFilter.value).toBe('{"name":"row_1"}');
+    expect(restoredSort.value).toBe(JSON.stringify({ name: 1 }));
+  });
+
+  it("restores the page position for skip-based stores", async () => {
+    backend.documentFindDocuments.mockReset();
+    backend.documentFindDocuments.mockResolvedValue(documentResult(1, 2, 6));
+
+    await mountBrowser({ stateKey: "tab-page" });
+    expect(backend.documentFindDocuments.mock.calls[0]![3]).toBe(0);
+
+    await dataGrid.paginate!(2, 2);
+    await flushUi();
+    expect(backend.documentFindDocuments.mock.calls[1]![3]).toBe(2);
+
+    app!.unmount();
+    app = null;
+    root!.replaceChildren();
+    await flushUi();
+    await mountBrowser({ stateKey: "tab-page" });
+
+    expect(backend.documentFindDocuments).toHaveBeenCalledTimes(3);
+    expect(backend.documentFindDocuments.mock.calls[2]![3]).toBe(2);
+    expect(dataGrid.pageOffset).toBe(2);
+  });
+
+  it("restarts from the first page for cursor-based stores (elasticsearch)", async () => {
+    backend.documentFindDocuments.mockReset();
+    backend.documentFindDocuments.mockResolvedValueOnce(documentResult(1, 2, 6, { next_cursor: "cursor-1" })).mockResolvedValue(documentResult(3, 2, 6));
+
+    await mountBrowser({ databaseType: "elasticsearch", stateKey: "tab-es" });
+
+    await dataGrid.paginate!(2, 2);
+    await flushUi();
+    expect(backend.documentFindDocuments.mock.calls[1]![3]).toBe(0);
+    expect(backend.documentFindDocuments.mock.calls[1]![10]).toBe("cursor-1");
+
+    app!.unmount();
+    app = null;
+    root!.replaceChildren();
+    await flushUi();
+    await mountBrowser({ databaseType: "elasticsearch", stateKey: "tab-es" });
+
+    const restoredCall = backend.documentFindDocuments.mock.calls.at(-1)!;
+    expect(restoredCall[3]).toBe(0);
+    expect(restoredCall[10]).toBeUndefined();
+  });
+
+  it("keeps tab states isolated from each other", async () => {
+    await mountBrowser({ stateKey: "tab-a" });
+    dataGrid.sort!("name", 1, "asc");
+    await flushUi();
+    app!.unmount();
+    app = null;
+    root!.replaceChildren();
+
+    await mountBrowser({ stateKey: "tab-b" });
+    expect(backend.documentFindDocuments).toHaveBeenCalledTimes(3);
+    expect(backend.documentFindDocuments.mock.calls[2]![7]).toBeUndefined();
+  });
+});
diff --git a/apps/desktop/src/components/layout/ContentArea.vue b/apps/desktop/src/components/layout/ContentArea.vue
index 1bf288f0c5..574d169093 100644
--- a/apps/desktop/src/components/layout/ContentArea.vue
+++ b/apps/desktop/src/components/layout/ContentArea.vue
@@ -2402,7 +2402,7 @@ defineExpose({
     <!-- Document mode: MongoDB collections and Elasticsearch indices -->
     <template v-else-if="activeTab.mode === 'mongo'">
       <div class="flex-1 min-h-0">
-        <DocumentBrowser ref="documentBrowserRef" :key="`${activeTab.id}:${activeTab.sql}`" :connection-id="activeTab.connectionId" :database="activeTab.database" :collection="activeTab.sql" :database-type="activeEffectiveDatabaseType" :table-meta="activeTab.tableMeta" />
+        <DocumentBrowser ref="documentBrowserRef" :key="`${activeTab.id}:${activeTab.sql}`" :connection-id="activeTab.connectionId" :database="activeTab.database" :collection="activeTab.sql" :database-type="activeEffectiveDatabaseType" :table-meta="activeTab.tableMeta" :state-key="activeTab.id" />
       </div>
     </template>
 
diff --git a/apps/desktop/src/lib/__tests__/tabs/documentBrowserStateCache.spec.ts b/apps/desktop/src/lib/__tests__/tabs/documentBrowserStateCache.spec.ts
new file mode 100644
index 0000000000..32429dacdc
--- /dev/null
+++ b/apps/desktop/src/lib/__tests__/tabs/documentBrowserStateCache.spec.ts
@@ -0,0 +1,59 @@
+import { describe, expect, it } from "vitest";
+import { clearDocumentBrowserState, restoreDocumentBrowserState, saveDocumentBrowserState, type DocumentBrowserStateSnapshot } from "@/lib/tabs/documentBrowserStateCache";
+
+function snapshot(page: number): DocumentBrowserStateSnapshot {
+  return {
+    filterInput: `{"page":${page}}`,
+    sortInput: `{"f":${page}}`,
+    appliedDocumentFilter: page % 2 === 0 ? { status: "active" } : null,
+    documentFilterRules: page % 2 === 0 ? [{ id: `rule-${page}`, fieldName: "status", mode: "equals", rawValue: "active", conjunction: "AND" }] : [],
+    page,
+  };
+}
+
+describe("documentBrowserStateCache", () => {
+  it("round-trips a snapshot for the same key", () => {
+    saveDocumentBrowserState("round-trip", snapshot(3));
+
+    expect(restoreDocumentBrowserState("round-trip")).toEqual(snapshot(3));
+  });
+
+  it("returns undefined for an unknown key", () => {
+    expect(restoreDocumentBrowserState("missing")).toBeUndefined();
+  });
+
+  it("keeps the most recent write for a key", () => {
+    saveDocumentBrowserState("overwrite", snapshot(1));
+    saveDocumentBrowserState("overwrite", snapshot(2));
+
+    expect(restoreDocumentBrowserState("overwrite")).toEqual(snapshot(2));
+  });
+
+  it("evicts the oldest entry beyond 32 keys", () => {
+    for (let index = 0; index < 33; index += 1) {
+      saveDocumentBrowserState(`evict-${index}`, snapshot(index));
+    }
+
+    expect(restoreDocumentBrowserState("evict-0")).toBeUndefined();
+    expect(restoreDocumentBrowserState("evict-1")).toBeDefined();
+    expect(restoreDocumentBrowserState("evict-32")).toBeDefined();
+  });
+
+  it("treats a restore as recency so a touched entry survives eviction", () => {
+    for (let index = 0; index < 32; index += 1) {
+      saveDocumentBrowserState(`touch-${index}`, snapshot(index));
+    }
+    expect(restoreDocumentBrowserState("touch-0")).toEqual(snapshot(0));
+    saveDocumentBrowserState("touch-new", snapshot(99));
+
+    expect(restoreDocumentBrowserState("touch-0")).toBeDefined();
+    expect(restoreDocumentBrowserState("touch-1")).toBeUndefined();
+  });
+
+  it("clears a key on demand", () => {
+    saveDocumentBrowserState("clear-me", snapshot(4));
+    clearDocumentBrowserState("clear-me");
+
+    expect(restoreDocumentBrowserState("clear-me")).toBeUndefined();
+  });
+});
diff --git a/apps/desktop/src/lib/tabs/documentBrowserStateCache.ts b/apps/desktop/src/lib/tabs/documentBrowserStateCache.ts
new file mode 100644
index 0000000000..d6bc98c9a2
--- /dev/null
+++ b/apps/desktop/src/lib/tabs/documentBrowserStateCache.ts
@@ -0,0 +1,45 @@
+import type { DocumentFilterRule } from "@/lib/app/documentStoreProvider";
+
+export interface DocumentBrowserStateSnapshot {
+  /** Manual JSON filter text from the collection filter input. */
+  filterInput: string;
+  /** Manual JSON sort text from the collection sort input. */
+  sortInput: string;
+  /** Structured-filter contribution applied on top of the manual filter. */
+  appliedDocumentFilter: Record<string, unknown> | null;
+  /** Rules backing the structured filter builder. */
+  documentFilterRules: DocumentFilterRule[];
+  /** Zero-based page position; only meaningful for skip-based stores. */
+  page: number;
+}
+
+// ContentArea renders only the active tab, so DocumentBrowser is unmounted on
+// every tab switch and remounted when the user comes back. Query conditions
+// survive that round trip through this session-scoped cache keyed by tab id —
+// the same role tab.whereInput/tab.orderByInput play for SQL data tabs. The
+// bound keeps state for long tab sessions from accumulating forever.
+const MAX_ENTRIES = 32;
+const cache = new Map<string, DocumentBrowserStateSnapshot>();
+
+export function restoreDocumentBrowserState(stateKey: string): DocumentBrowserStateSnapshot | undefined {
+  const snapshot = cache.get(stateKey);
+  if (!snapshot) return undefined;
+  // Refresh LRU recency.
+  cache.delete(stateKey);
+  cache.set(stateKey, snapshot);
+  return snapshot;
+}
+
+export function saveDocumentBrowserState(stateKey: string, snapshot: DocumentBrowserStateSnapshot): void {
+  cache.delete(stateKey);
+  cache.set(stateKey, snapshot);
+  while (cache.size > MAX_ENTRIES) {
+    const oldest = cache.keys().next().value;
+    if (oldest === undefined) break;
+    cache.delete(oldest);
+  }
+}
+
+export function clearDocumentBrowserState(stateKey: string): void {
+  cache.delete(stateKey);
+}