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Posted on June 20, 2025

DotNetBrowser 3.3.0

Chromium 137.0.7151.69

We upgraded Chromium to a newer version, which introduces major security fixes including the fix for a vulnerability that have known exploits:

You can read more about it in the Chromium blog posts:

Download files in one call

Starting with DotNetBrowser 3.3.0, you can download any file without navigating to it:

browser.DownloadResource("https://example.com/avatar.png");

The browser will send a request with appropriate cookies saved for a domain. If the URL is valid and the server responds with a downloadable resource, the browser will start downloading.

To control the downloading process, use the StartDownloadHandler as we describe in the Downloads guide.

Widevine API

We’ve added a new Widevine API that gives you fine-grained control over enabling Widevine support in DotNetBrowser. To enable it and play the DRM-encoded content, use the code sample below:

var status = await engine.Widevine.Activate();
Dim status = engine.Widevine.Activate().Result

The status will indicate whether the Widevine component was activated successfully.

More details are available in the Media guide.

Widevine is a Google proprietary component, governed by its own terms of use. For more information, refer to Widevine.

Absolute bounds of elements

Up to this version, you could only get the bounds of an HTML element relative to its frame. In this version, we have added the BoundingClientRectInViewport property that returns global bounds an element, relative to the viewport:

var localBounds = element.BoundingClientRect;
var globalBounds = element.BoundingClientRectInViewport;

Quality enhancements

  • Thumbnails are now provided properly in StartSessionHandler parameters for WebRTC screen sharing.

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