Firefox 4 will be bringing hardware-accelerated graphics with Direct2D support in Firefox 4, but that will not be enabled by default. The Firefox team believes that feature is not quite ready to be rolled out for everyone.
Even though it’s not enabled by default, you can still enable it manually with the help of the instructions given at the Firefox Wiki.
Mozilla will be releasing Firefox 4 beta 4 for download on Monday, just days after beta 3 was released, Neowin reports.
Firefox 4 beta 4 will be released with two new features: hardware-accelerated graphics for Windows users and tab sets.