WPF MVVM - Working with tab controls and tab content
У вашего броузера проблема в совместимости с HTML5
Learn how to create, open, and close tabs effectively using the MVVM pattern with WPF. Facilitates unit testing.
Source Code:
https://1drv.ms/u/s!Agyk41TbkFnXgfM---Nd1zFdHnNnXA