2 things:

My last post impled that you need to go into the menu and fiddle with font sizes to zoom in/out. This is mainly because this is exactly what I thought. However, I have since discovered that the volume keys act as zoom in/out in XTem, just like in the browser, and this works just as well and much more conveniently.

Also I've updated the wiki page on getting the browser location bar to quick search various sites. Why is this relevant on this thread? Well, the file I've added includes the wikia nethack wiki, WikiHack, as one of the searches available. Go to the wiki, download the UK-centric search file and follow the instructions. Typing into your browser's search bar will search wikihack for foo.