Certain websites can't use suggested search (MAC)

Hello,

I'm relatively new to Mac and have been enjoying my experience so far. However one thing is bugging me because I cannot figure out how to solve it.
Many websites such as Youtube and Ebay will offer suggestions when you are typing to make searching quicker. My Mac works fine with those sites but on other sites that I know offer suggested search nothing loads (for example trollandtoad.com, a trading card site).

Is there any way to fix this?

Many Thanks