One of the major problems when designing and programming a website is the way it looks like in the browser. Many people use to design and program the website in a unique browser and forgot o test it in the other ones (or al least, in the most popular ones).

In my opinion, every website must be tested at least in Firefox, Internet Explorer and Safari. Maybe I can add Opera too, but the other three represents a great percentage of all internet users.

The best way to do this is installing all these browsers in your computer. If you are lazy for this, you can use BrowserShots, a very nice online tool that helps you testing your website in different browsers. Be patient, sometimes it’s a bit slow, but a good tool.