--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -4477,17 +4477,17 @@ pref("gfx.direct2d.disabled", false);
 
 // Whether to attempt to enable Direct2D regardless of automatic detection or
 // blacklisting
 pref("gfx.direct2d.force-enabled", false);
 
 pref("layers.prefer-opengl", false);
 pref("layers.prefer-d3d9", false);
 pref("layers.d3d11.force-warp", false);
-pref("layers.d3d11.disable-warp", false);
+pref("layers.d3d11.disable-warp", true);
 #endif
 
 // Force all possible layers to be always active layers
 pref("layers.force-active", false);
 
 // Never use gralloc surfaces, even when they're available on this
 // platform and are the optimal surface type.
 pref("layers.gralloc.disable", false);