Kat, A home button can be found by RtClick on the browser bar, >click "buttons", >click "browser" in the list, then drag any buttons you fancy onto their desired position on the bar.

I've just been adding Opera as a trial, not sure whether I like it yet. I'm a simple sort, who finds having too many choices is a bit of a bind. I think I may prefer the separation of e-mail business from surfing achieved with Firefox plus Thunderbird.