diff --git a/widget/GfxDriverInfo.cpp b/widget/GfxDriverInfo.cpp
index 327a56631e87..56bb87a3c1ec 100644
--- a/widget/GfxDriverInfo.cpp
+++ b/widget/GfxDriverInfo.cpp
@@ -275,9 +275,6 @@ const GfxDeviceFamily* GfxDriverInfo::GetDeviceFamily(DeviceFamily id)
       APPEND_DEVICE(0xa011);
       APPEND_DEVICE(0xa012);
       break;
-    case AMDRadeonHD5800:
-      APPEND_DEVICE(0x6899);
-      break;
     // This should never happen, but we get a warning if we don't handle this.
     case DeviceFamilyMax:
       NS_WARNING("Invalid DeviceFamily id");
diff --git a/widget/GfxDriverInfo.h b/widget/GfxDriverInfo.h
index 91f9f39a80d2..3e5cad79f2a8 100644
--- a/widget/GfxDriverInfo.h
+++ b/widget/GfxDriverInfo.h
@@ -88,7 +88,6 @@ enum DeviceFamily {
   Geforce7300GT,
   Nvidia310M,
   Nvidia8800GTS,
-  AMDRadeonHD5800,
   Bug1137716,
   Bug1116812,
   Bug1155608,
diff --git a/widget/windows/GfxInfo.cpp b/widget/windows/GfxInfo.cpp
index d8defde6516f..6b0400a893c7 100644
--- a/widget/windows/GfxInfo.cpp
+++ b/widget/windows/GfxInfo.cpp
@@ -1078,12 +1078,6 @@ GfxInfo::GetGfxDriverInfo()
       nsIGfxInfo::FEATURE_DIRECT2D, nsIGfxInfo::FEATURE_BLOCKED_DEVICE,
       DRIVER_LESS_THAN, GfxDriverInfo::allDriverVersions, "FEATURE_FAILURE_BUG_1008759");
 
-    /* Bug 1151721: Black video on youtube, block DXVA for all older intel cards. */
-    APPEND_TO_DRIVER_BLOCKLIST2(DRIVER_OS_ALL,
-      (nsAString&)GfxDriverInfo::GetDeviceVendor(VendorATI), (GfxDeviceFamily*)GfxDriverInfo::GetDeviceFamily(AMDRadeonHD5800),
-      nsIGfxInfo::FEATURE_HARDWARE_VIDEO_DECODING, nsIGfxInfo::FEATURE_BLOCKED_DEVICE,
-      DRIVER_LESS_THAN, GfxDriverInfo::allDriverVersions, "FEATURE_FAILURE_BUG_1151721");
-
     /* Bug 1139503: DXVA crashes with ATI cards on windows 10. */
     APPEND_TO_DRIVER_BLOCKLIST2(DRIVER_OS_WINDOWS_10,
       (nsAString&)GfxDriverInfo::GetDeviceVendor(VendorATI), GfxDriverInfo::allDevices,