If you’re trying to figure out what happened to Adobe Browserlab, it’s gone…
Adobe BrowserLab was designed to help web designers preview how pages display in a variety of Web browsers, even if you didn’t have all of those browsers available on your won local hard drive.
But in 2013 Adobe announced they were closing down the service: http://blogs.adobe.com/browserlab/2013/03/13/browserlab-is-shutting-down-on-march-13-2013/
You can find other online browser testing services in this review
You used to be able to compare multiple browser displays on Browserlab – I removed the article about this service because it closed