Greasemonkey is a Firefox extension that allows you to write scripts that alter the web pages you visit. You can use it to make a web site more readable or more usable. As in Travian, you will need help by script that are writes in greasemonkey to help your play easier. There are lots of usefull script that actually illegal, but they basicly dont know if you use it or not. Example of scripts that are very helpful are travian beyond, attacker notifier, auto task, farm machine, user activity and so on. this script make your travian game easier.
Here's the link for greasmonkey add on for you to download.
p/s: i will add up some review on good travian script on my next post.