This is not best idea. Why? TWebBrowser component requires Internet Explorer instalation. This means that it won't work on ony computer that has no Internet Explorere installed. While most pepole leve IE installed and simply use other browsers some pepole actually remove IE from their computer.
Some pepole also block JS execution in their brosers which could again lead to trouble.

So how to solve these problems the easiest way. Some time ago I have seen an article about TWebBrowser component replacment which in the background uses FrireFox instead of IE. I'm sorry but I don't remember where I have seen this.