Why is my WebBrowser positioned incorrectly? - MahApps/MahApps.Metro GitHub Wiki

img thanks to @myCollections for providing this screenshot from #1038

Chances are

  • your WebBrowser is being moved by the MetroWindow's built-in TransitioningContentControl.

Solution

The solution for the issue is to set the WindowTransitionsEnabled property on your MetroWindow to false (or use the AirspaceDecorator explained here).