webbrowser scrollbarsenabled not working in some website

Hello guys. I am using the code below to enable or disable the scrollbars of the webbrowser.

WebBrowser1.ScrollBarsEnabled = False
WebBrowser2.ScrollBarsEnabled = False

However I noticed that when I use the above code for navigating a webbrowser to google.com, the scrollbars are still there but with yahoo.com, the scrollbars are disabled.
What is the resolution for this problem?