Sorry for late response but under "Settings - General - Manage Engines" you can have a keyword for a engine, so that when you start off with that keyword that search "Engine link" is used to do a search. It overwrites moving you to a website so if I wanted to for example search for the Maxthon website for any reason instead of getting sent to maxthon.com I'd put in "s maxthon.com" in the searchbar for my example below.
However, this functionality worked for me only a couple of months ago and has no longer worked since.
Scratch that, it was fixed in yesterday's update! Nice!