Alert on Possible Technical Issues

My work with Word Press and Dream Host in setting up the blog has been done on a “Windows” based computer.  I have instructed the system to return to where a user exited the blog when they leave the blog to view a video.  In Windows, using the “x” in the upper right hand corner of the computer screen to close a video window returns the user to the blog.  But I have noticed that when the blog is accessed using an Apple system a user can use the “tab” on the  menu to return to the blog.

Internet Explorer and Google Chrome the blog seems to behave in the same way.

Please let me know if you are experiencing difficulties using the blog and I will try to find out how to resolve the issue.