Surfy is a tabbed web browser for our Windows Phones. It was initially released for Windows Phone 7 and was overhauled earlier this year for Windows Phone 8. However due to a few stability issues publicizing the app was held off until those bugs could be addressed.
The updated version went live over the weekend and delivers a rather peachy tabbed web browser with voice command support. Version 2.1 of Surfy also adds a text to speech feature that adds an audio reading of web pages.
In the short time we've tinkered with Surfy this afternoon, it makes a nice impression. It might just be that Windows Phone web browser you've been looking for.