The way to access the controller through a browser is to open a new tab and simply entering the IP address of the controller, e.g. 192.168.10.100.
If you are using the multiple graphical interfaces function, you will need to enter a bit more than just the IP address.
The three different address you need is as follows: (X = IP adress)
http://XXX.XXX.XXX.XXX/pages.html?id=1
http://XXX.XXX.XXX.XXX/pages.html?id=2
http://XXX.XXX.XXX.XXX/pages.html?id=3