I know it sounds like a dumb question but the web site has to follow some pretty tight rules if they want Smart TVs to use their web site. Here's a link with some of the rules.
And to head off a possible question, no, this is not upgradeable like your PC is. That is, the browser has limitations as it's a TV.
I have Samsung Smart TV UE32EH5300, and lately many problems with my browser. I keep getting the message that browser session ended unexpectedly due to a lack of memory or some other reason - which gets me back to the home page or the page I was watching last, but surely I have to start the streaming from the beginning which is quite annoying. I tried deleting history, cookies, everything.. nothing helped. Any ideas?