User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0 Build ID: 20141106120505 Steps to reproduce: I have problem with turning on "Hardware acceleration" on Firefox 33.0.3 and above - currently Firefox 33.1. I had no issues with 33.0.2 below. But I found that Firefox add this patch: 1093863 https://bugzilla.mozilla.org/show_bug.cgi?id=1093863 and Hardware Acceleration is disabled - also with Directwrite font rendering - on my computer. My specs: HP probook 4540s with Intel HD 4000 and AMD HD7650M. Drivers lastest from Intel and AMD. Intel 10.18.10.3958 and AMD CCC 14.9 WHQL. Please fix this. Actual results: Hardware Acceleration is disabled Expected results: Hardware Acceleration with Directwrite should be enabled like Firefox 33.0.2 below.