I don’t know if you guys are using it, but there is a great online tool for easily conducting browser compatibility testing and preview web pages across popular browsers.
It’s called Adobe BrowserLab and you can find it here: https://browserlab.adobe.com/
I really find it extremely helpful, maybe it will help you too.
- Sold between 100 000 and 250 000 dollars
- Author was Featured
- France
- Item was Featured
- Author had a File in an Envato Bundle
- Author had a Free File of the Month
- Contributed a Tutorial to a Tuts+ Site
- Repeatedly Helped protect Envato Marketplaces against copyright violations
This is more for IE but until now the only tool that I’ve found to be accurate was VMware player (or any virtual machine). I have 3 separate installations of Windows XP/7 and I can know for sure how it looks under IE7, 8 and 9 
