Windows Hardware Acceleration: changed from Direct9 to Direct10 where working (Windows Vista or higher). In addition, activated Direct2D to further improve the rendering of pages. You can check on the page about: support in the graphics section. (If disabled, for example, put 0/1 in the latter, may be due to your drivers for video card are outdated and are marked as faulty by Mozilla, so you have to update to the latest version from page of your card, we will talk more about that in later entries ).