diff --git a/addons/addon-canvas/src/CanvasRenderer.ts b/addons/addon-canvas/src/CanvasRenderer.ts
index 40b89546..148ae736 100644
--- a/addons/addon-canvas/src/CanvasRenderer.ts
+++ b/addons/addon-canvas/src/CanvasRenderer.ts
@@ -10,7 +10,7 @@ import { createRenderDimensions } from 'browser/renderer/shared/RendererUtils';
 import { IRenderDimensions, IRenderer, IRequestRedrawEvent } from 'browser/renderer/shared/Types';
 import { ICharSizeService, ICharacterJoinerService, ICoreBrowserService, IThemeService } from 'browser/services/Services';
 import { EventEmitter, forwardEvent } from 'common/EventEmitter';
-import { Disposable, toDisposable } from 'common/Lifecycle';
+import { Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
 import { IBufferService, ICoreService, IDecorationService, IOptionsService } from 'common/services/Services';
 import { Terminal } from '@xterm/xterm';
 import { CursorRenderLayer } from './CursorRenderLayer';
@@ -22,6 +22,7 @@ import { IRenderLayer } from './Types';
 export class CanvasRenderer extends Disposable implements IRenderer {
   private _renderLayers: IRenderLayer[];
   private _devicePixelRatio: number;
+  private _observerDisposable = this.register(new MutableDisposable());
 
   public dimensions: IRenderDimensions;
 
@@ -60,7 +61,11 @@ export class CanvasRenderer extends Disposable implements IRenderer {
     this._devicePixelRatio = this._coreBrowserService.dpr;
     this._updateDimensions();
 
-    this.register(observeDevicePixelDimensions(this._renderLayers[0].canvas, this._coreBrowserService.window, (w, h) => this._setCanvasDevicePixelDimensions(w, h)));
+    this._observerDisposable.value = observeDevicePixelDimensions(this._renderLayers[0].canvas, this._coreBrowserService.window, (w, h) => this._setCanvasDevicePixelDimensions(w, h));
+    this.register(this._coreBrowserService.onWindowChange(w => {
+      this._observerDisposable.value = observeDevicePixelDimensions(this._renderLayers[0].canvas, w, (w, h) => this._setCanvasDevicePixelDimensions(w, h));
+    }));
+
     this.register(toDisposable(() => {
       for (const l of this._renderLayers) {
         l.dispose();
diff --git a/addons/addon-webgl/src/WebglRenderer.ts b/addons/addon-webgl/src/WebglRenderer.ts
index 2bccc9b7..f2f2c83e 100644
--- a/addons/addon-webgl/src/WebglRenderer.ts
+++ b/addons/addon-webgl/src/WebglRenderer.ts
@@ -33,6 +33,7 @@ export class WebglRenderer extends Disposable implements IRenderer {
   private _charAtlasDisposable = this.register(new MutableDisposable());
   private _charAtlas: ITextureAtlas | undefined;
   private _devicePixelRatio: number;
+  private _observerDisposable = this.register(new MutableDisposable());
 
   private _model: RenderModel = new RenderModel();
   private _workCell: CellData = new CellData();
@@ -123,7 +124,10 @@ export class WebglRenderer extends Disposable implements IRenderer {
       this._requestRedrawViewport();
     }));
 
-    this.register(observeDevicePixelDimensions(this._canvas, this._coreBrowserService.window, (w, h) => this._setCanvasDevicePixelDimensions(w, h)));
+    this._observerDisposable.value = observeDevicePixelDimensions(this._canvas, this._coreBrowserService.window, (w, h) => this._setCanvasDevicePixelDimensions(w, h));
+    this.register(this._coreBrowserService.onWindowChange(w => {
+      this._observerDisposable.value = observeDevicePixelDimensions(this._canvas, w, (w, h) => this._setCanvasDevicePixelDimensions(w, h));
+    }));
 
     this._core.screenElement!.appendChild(this._canvas);
 
diff --git a/src/browser/RenderDebouncer.ts b/src/browser/RenderDebouncer.ts
index b3118d5f..dd3b97a6 100644
--- a/src/browser/RenderDebouncer.ts
+++ b/src/browser/RenderDebouncer.ts
@@ -4,6 +4,7 @@
  */
 
 import { IRenderDebouncerWithCallback } from 'browser/Types';
+import { ICoreBrowserService } from 'browser/services/Services';
 
 /**
  * Debounces calls to render terminal rows using animation frames.
@@ -16,14 +17,14 @@ export class RenderDebouncer implements IRenderDebouncerWithCallback {
   private _refreshCallbacks: FrameRequestCallback[] = [];
 
   constructor(
-    private _parentWindow: Window,
-    private _renderCallback: (start: number, end: number) => void
+    private _renderCallback: (start: number, end: number) => void,
+    private readonly _coreBrowserService: ICoreBrowserService
   ) {
   }
 
   public dispose(): void {
     if (this._animationFrame) {
-      this._parentWindow.cancelAnimationFrame(this._animationFrame);
+      this._coreBrowserService.window.cancelAnimationFrame(this._animationFrame);
       this._animationFrame = undefined;
     }
   }
@@ -31,7 +32,7 @@ export class RenderDebouncer implements IRenderDebouncerWithCallback {
   public addRefreshCallback(callback: FrameRequestCallback): number {
     this._refreshCallbacks.push(callback);
     if (!this._animationFrame) {
-      this._animationFrame = this._parentWindow.requestAnimationFrame(() => this._innerRefresh());
+      this._animationFrame = this._coreBrowserService.window.requestAnimationFrame(() => this._innerRefresh());
     }
     return this._animationFrame;
   }
@@ -49,7 +50,7 @@ export class RenderDebouncer implements IRenderDebouncerWithCallback {
       return;
     }
 
-    this._animationFrame = this._parentWindow.requestAnimationFrame(() => this._innerRefresh());
+    this._animationFrame = this._coreBrowserService.window.requestAnimationFrame(() => this._innerRefresh());
   }
 
   private _innerRefresh(): void {
diff --git a/src/browser/services/RenderService.ts b/src/browser/services/RenderService.ts
index 9fa8d234..c2cb9a05 100644
--- a/src/browser/services/RenderService.ts
+++ b/src/browser/services/RenderService.ts
@@ -8,9 +8,9 @@ import { IRenderDebouncerWithCallback } from 'browser/Types';
 import { IRenderDimensions, IRenderer } from 'browser/renderer/shared/Types';
 import { ICharSizeService, ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
 import { EventEmitter } from 'common/EventEmitter';
-import { Disposable, MutableDisposable } from 'common/Lifecycle';
+import { Disposable, MutableDisposable, toDisposable } from 'common/Lifecycle';
 import { DebouncedIdleTask } from 'common/TaskQueue';
-import { IBufferService, IDecorationService, IInstantiationService, IOptionsService } from 'common/services/Services';
+import { IBufferService, IDecorationService, IOptionsService } from 'common/services/Services';
 
 interface ISelectionState {
   start: [number, number] | undefined;
@@ -24,6 +24,7 @@ export class RenderService extends Disposable implements IRenderService {
   private _renderer: MutableDisposable<IRenderer> = this.register(new MutableDisposable());
   private _renderDebouncer: IRenderDebouncerWithCallback;
   private _pausedResizeTask = new DebouncedIdleTask();
+  private _observerDisposable = this.register(new MutableDisposable());
 
   private _isPaused: boolean = false;
   private _needsFullRefresh: boolean = false;
@@ -38,7 +39,7 @@ export class RenderService extends Disposable implements IRenderService {
   };
 
   private readonly _onDimensionsChange = this.register(new EventEmitter<IRenderDimensions>());
-  public readonly onDimensionsChange =  this._onDimensionsChange.event;
+  public readonly onDimensionsChange = this._onDimensionsChange.event;
   private readonly _onRenderedViewportChange = this.register(new EventEmitter<{ start: number, end: number }>());
   public readonly onRenderedViewportChange = this._onRenderedViewportChange.event;
   private readonly _onRender = this.register(new EventEmitter<{ start: number, end: number }>());
@@ -56,12 +57,11 @@ export class RenderService extends Disposable implements IRenderService {
     @IDecorationService decorationService: IDecorationService,
     @IBufferService bufferService: IBufferService,
     @ICoreBrowserService coreBrowserService: ICoreBrowserService,
-    @IInstantiationService instantiationService: IInstantiationService,
     @IThemeService themeService: IThemeService
   ) {
     super();
 
-    this._renderDebouncer = new RenderDebouncer(coreBrowserService.window, (start, end) => this._renderRows(start, end));
+    this._renderDebouncer = new RenderDebouncer((start, end) => this._renderRows(start, end), coreBrowserService);
     this.register(this._renderDebouncer);
 
     this.register(coreBrowserService.onDprChange(() => this.handleDevicePixelRatioChange()));
@@ -102,12 +102,17 @@ export class RenderService extends Disposable implements IRenderService {
 
     this.register(themeService.onChangeColors(() => this._fullRefresh()));
 
+    this._registerIntersectionObserver(coreBrowserService.window, screenElement);
+    this.register(coreBrowserService.onWindowChange((w) => this._registerIntersectionObserver(w, screenElement)));
+  }
+
+  private _registerIntersectionObserver(w: Window & typeof globalThis, screenElement: HTMLElement): void {
     // Detect whether IntersectionObserver is detected and enable renderer pause
     // and resume based on terminal visibility if so
-    if ('IntersectionObserver' in coreBrowserService.window) {
-      const observer = new coreBrowserService.window.IntersectionObserver(e => this._handleIntersectionChange(e[e.length - 1]), { threshold: 0 });
+    if ('IntersectionObserver' in w) {
+      const observer = new w.IntersectionObserver(e => this._handleIntersectionChange(e[e.length - 1]), { threshold: 0 });
       observer.observe(screenElement);
-      this.register({ dispose: () => observer.disconnect() });
+      this._observerDisposable.value = toDisposable(() => observer.disconnect());
     }
   }