What Web Browsers Should I Test With?

In a previous post, we discussed the importance of testing your website with older web browsers. MaximumPC has a very informative article on the latest browsers of today and tomorrow (for Windows primarily) which makes a good starting place if you want to be comprehensive in the compatibility testing you perform. Here's a summary of the list, along with the January 2009 stats for each from W3Schools:Stable/Current Releases

• Microsoft Internet Explorer 7 - 25.7%
• Microsoft Internet Explorer 6 - 18.5% (Lots of people still haven't upgraded)
• Mozilla Firefox 3 - 39.5%
• Opera 9.6 - 2.3%
• Apple Safari 3 - 3%

Upcoming/Beta Releases

• Google Chrome 1.0 - 3.9%
• Microsoft Internet Explorer 8 Beta 2 - 0.6%
• Mozilla Firefox 3.1 Beta 2 - N/A
• Opera 10 Alpha - N/A
• Apple Safari 4 Beta - N/A

And don't forget, you can use BrowserShots to generate quick screenshots of your website for review. All of the above browsers, except for Opera 10, are among the browsers that you can get screenshots of.