diff --git a/apps/client/src/types-pdfjs.d.ts b/apps/client/src/types-pdfjs.d.ts
index 54a440f16..13cb91f6e 100644
--- a/apps/client/src/types-pdfjs.d.ts
+++ b/apps/client/src/types-pdfjs.d.ts
@@ -1,3 +1,15 @@
 interface Window {
+    /**
+     * By default, pdf.js will try to store information about the opened PDFs such as zoom and scroll position in local storage.
+     * The Trilium alternative is to use attachments stored at note level.
+     * This variable represents the direct content used by the pdf.js viewer in its local storage key, but in plain JS object format.
+     * The variable must be set early at startup, before pdf.js fully initializes.
+     */
     TRILIUM_VIEW_HISTORY_STORE?: object;
+
+    /**
+     * If set to true, hides the pdf.js viewer default sidebar containing the outline, page navigation, etc.
+     * This needs to be set early in the main method.
+     */
+    TRILIUM_HIDE_SIDEBAR?: boolean;
 }
diff --git a/apps/client/src/widgets/note_types.tsx b/apps/client/src/widgets/note_types.tsx
index a6b3feb27..76142b7af 100644
--- a/apps/client/src/widgets/note_types.tsx
+++ b/apps/client/src/widgets/note_types.tsx
@@ -4,7 +4,8 @@
  */
 
 import { NoteType } from "@triliumnext/commons";
-import { VNode, type JSX } from "preact";
+import { type JSX,VNode } from "preact";
+
 import { TypeWidgetProps } from "./type_widgets/type_widget";
 
 /**
@@ -13,7 +14,7 @@ import { TypeWidgetProps } from "./type_widgets/type_widget";
  */
 export type ExtendedNoteType = Exclude<NoteType, "launcher" | "text" | "code"> | "empty" | "readOnlyCode" | "readOnlyText" | "editableText" | "editableCode" | "attachmentDetail" | "attachmentList" |  "protectedSession" | "aiChat";
 
-export type TypeWidget = ((props: TypeWidgetProps) => VNode | JSX.Element);
+export type TypeWidget = ((props: TypeWidgetProps) => VNode | JSX.Element | undefined);
 type NoteTypeView = () => (Promise<{ default: TypeWidget } | TypeWidget> | TypeWidget);
 
 interface NoteTypeMapping {
diff --git a/packages/pdfjs-viewer/src/pages.ts b/packages/pdfjs-viewer/src/pages.ts
index e63c234b9..67896e256 100644
--- a/packages/pdfjs-viewer/src/pages.ts
+++ b/packages/pdfjs-viewer/src/pages.ts
@@ -64,7 +64,7 @@ async function generateThumbnail(pageNumber: number) {
 
         // Render page to canvas
         await page.render({
-            canvasContext: context,
+            canvas: canvas,
             viewport: viewport
         }).promise;
 
diff --git a/packages/pdfjs-viewer/src/toc.ts b/packages/pdfjs-viewer/src/toc.ts
index eca3d7da8..ddc2db707 100644
--- a/packages/pdfjs-viewer/src/toc.ts
+++ b/packages/pdfjs-viewer/src/toc.ts
@@ -126,7 +126,6 @@ export function setupActiveHeadingTracking() {
     function updateActiveHeading() {
         if (!headingPositions || headingPositions.length === 0) return;
 
-        const currentPage = app.page - 1; // PDF.js uses 1-based, we need 0-based
         const viewer = app.pdfViewer;
         const container = viewer.container;
         const scrollTop = container.scrollTop;
diff --git a/packages/pdfjs-viewer/src/typings.d.ts b/packages/pdfjs-viewer/src/typings.d.ts
index 9370df20a..50ac44fc0 100644
--- a/packages/pdfjs-viewer/src/typings.d.ts
+++ b/packages/pdfjs-viewer/src/typings.d.ts
@@ -14,10 +14,32 @@ declare global {
         _readFromStorage: () => Promise<string>;
     }
 
+    interface PdfJsDestination {
+
+    }
+
     interface Window {
         PDFViewerApplication?: {
             initializedPromise: Promise<void>;
             pdfDocument: PDFDocumentProxy;
+            pdfViewer: {
+                currentPageNumber: number;
+                optionalContentConfigPromise: {
+                    setVisibility(groupId: string, visible: boolean);
+                    getGroup(groupId: string): {
+                        name: string;
+                        usage: {};
+                    };
+                    getOrder(): {}[]
+                };
+                getPageView(pageIndex: number): {
+                    div: HTMLDivElement;
+                };
+                container: HTMLElement;
+            };
+            pdfLinkService: {
+                goToDestination(dest: PdfJsDestination);
+            };
             eventBus: {
                 on(event: string, listener: (...args: any[]) => void): void;
                 dispatch(event: string, data?: any): void;