Different browsers behave differently, common browser brands are
Internet Explorer, Chrome, Firefox and Safari, there are many more but these are the most common.
Internet Explorer is exclusive to Microsoft Windows, and has many versions depending on your operating system (OS) i.e. Windows XP, Vista, 7, 8, 8.1and the Upcoming Windows Nine.
Internet Explorer has versions, 6, 7, 8, 9, 10 and 11.
Why does this matter?
If you are having trouble viewing you course the most common problem is browser/OS based.
So if you are using Windows XP with internet Explorer 6 you will have problems, this combination is over 13 years old and is no longer supported by Microsoft or Google or this site.
In fact as of April 2014 Microsoft no longer support Windows XP either. Which means from this date any future bugs or security vulnerabilities will no longer be fixed.
What this all means to you?
If you need to contact us because you are having trouble with the site, the information about your operating system and browser will really help us to help you, don't worry we'll show you how to find this info if you’re not sure.