HTMLViewer options on Windows aren’t exactly great right now. X-UA-Compatible on Windows 10 uses Edge and works well. WebKit renderer adds significantly to install size and adds cef subprocesses that sometimes don’t shutdown, creating customer support issues. Windows 7 is left out in the cold.
WebView2, from what I can tell from the docs, would solve this problem. We could have a consistent Edge experience Windows, making the renderer property almost obsolete.
In the meantime, I guess I’ll use ShowURL on Windows 7 (maybe 8 too) because the native render can’t even open the url I need.