The competition among the web browsers is really tough these days. Previously, it was Internet Explorer, Firefox and Opera in the race but the Chrome has pushed every Web browser behind. When it comes to Google, the perfections are always there.
Though Google Chrome is new and not 100% compatible with all the websites, it is still one of the most popular web browser now and after the Beta 4.0, Chrome is taking a big lead. Google Chrome is also current fastest browser .
On the other side, the Microsoft Internet Explorer 8 may have lost its users due to recent security flaws hence Firefox is ahead of Explorer now. After the 3.6 release of Firefox, it has become the most advanced web browser.
As a summary, if you are only looking for good speed, Google Chrome is best but if you need some good and advanced add-ons, Firefox is a better choice.
We can only hope that IE8 may come back with a bang again.