diff --git a/lib/gui/app/app.ts b/lib/gui/app/app.ts
index ab4325f8..f177a9e9 100644
--- a/lib/gui/app/app.ts
+++ b/lib/gui/app/app.ts
@@ -356,6 +356,16 @@ async function main() {
 	ReactDOM.render(
 		React.createElement(MainPage),
 		document.getElementById('main'),
+		// callback to set the correct zoomFactor for webviews as well
+		async () => {
+			const fullscreen = await settings.get('fullscreen');
+			const width = fullscreen ? window.screen.width : window.outerWidth;
+			try {
+				electron.webFrame.setZoomFactor(width / settings.DEFAULT_WIDTH);
+			} catch (err) {
+				// noop
+			}
+		},
 	);
 }
 
diff --git a/lib/gui/app/models/settings.ts b/lib/gui/app/models/settings.ts
index 7deb1f11..8bfc9106 100644
--- a/lib/gui/app/models/settings.ts
+++ b/lib/gui/app/models/settings.ts
@@ -26,6 +26,9 @@ const debug = _debug('etcher:models:settings');
 
 const JSON_INDENT = 2;
 
+export const DEFAULT_WIDTH = 800;
+export const DEFAULT_HEIGHT = 480;
+
 /**
  * @summary Userdata directory path
  * @description
diff --git a/lib/gui/etcher.ts b/lib/gui/etcher.ts
index 36282fd4..02657539 100644
--- a/lib/gui/etcher.ts
+++ b/lib/gui/etcher.ts
@@ -122,8 +122,8 @@ interface AutoUpdaterConfig {
 
 async function createMainWindow() {
 	const fullscreen = Boolean(await settings.get('fullscreen'));
-	const defaultWidth = 800;
-	const defaultHeight = 480;
+	const defaultWidth = settings.DEFAULT_WIDTH;
+	const defaultHeight = settings.DEFAULT_HEIGHT;
 	let width = defaultWidth;
 	let height = defaultHeight;
 	if (fullscreen) {