A few days ago, we heard about Microsoft planning to include Direct2D acceleration in the yet-to-come IE9, thus leveraging today's poweful GPUs to render web content. Mozilla didn't fall behind: last Sunday, Firefox hacker Bas Schouten revealed a build of Firefox 3.7 with built-in Direct2D acceleration on his blog. His performance tests claim that popular sites like Facebook and Twitter render twice as fast compared to Firefox without Direct2D rendering. More complex sites do not see a lot of benefits, tough. This build requires DirectX 10 and a WDDM 1.0 compatible graphics drive, and thus, Windows Vista or 7. Download it here.