BrowserLab provides web designers exact renderings of their web pages in multiple browsers and operating systems, on demand. BrowserLab is a powerful solution for cross-browser compatibility testing, featuring multiple viewing and comparison tools, as well as customizable preferences. Since BrowserLab is an online service, it can be accessed from virtually any computer connected to the web. Also, Adobe Dreamweaver® CS4 software
users have access to additional functionality such as testing local and active content.

Supported Browsers and Operating Systems
* Firefox 2.0, 3.0 and 3.5 (Windows XP and Mac OS X)
* Internet Explorer 6.X, 7.X, and 8.X (Windows XP)
* Safari 3.X and 4.X (Mac OS X)
* Chrome 3.0 (Windows XP)
Viewing and Diagnostics Tools
Screenshots can be viewed in a single view, side by side view, or as an overlay view with variable transparency. Each viewing option features a zoom function. We’ve also added measurement tools like Rulers and Guides, custom Onion Skin Registration, as well as the ability to move quickly to specific areas of a screenshot. You can also save screenshots in 1-Up or 2-Up views.
Browser Sets
Browser Sets allow designers to customize, edit, and save a combination of browsers to test.
Great Online Service
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Nice… but it not ready for prime time yet. Browser list is very modest to say the least and scrollbar supports is buggy.
But probably most importantly – there is no way to interact with the web site.
If you need a more professional tool that does not suffer from the above limitations – check http://browserseal.com
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