diff --git a/gfx/thebes/gfxPrefs.h b/gfx/thebes/gfxPrefs.h
index 0b481fd722d5..2716b2a41505 100644
--- a/gfx/thebes/gfxPrefs.h
+++ b/gfx/thebes/gfxPrefs.h
@@ -416,7 +416,6 @@ private:
   DECL_GFX_PREF(Once, "image.multithreaded_decoding.limit",    ImageMTDecodingLimit, int32_t, -1);
   DECL_GFX_PREF(Live, "image.single-color-optimization.enabled", ImageSingleColorOptimizationEnabled, bool, true);
 
-  DECL_GFX_PREF(Live, "layers.child-process-shutdown",         ChildProcessShutdown, bool, true);
   DECL_GFX_PREF(Once, "layers.acceleration.disabled",          LayersAccelerationDisabledDoNotUseDirectly, bool, false);
   DECL_GFX_PREF(Live, "layers.acceleration.draw-fps",          LayersDrawFPS, bool, false);
   DECL_GFX_PREF(Live, "layers.acceleration.draw-fps.print-histogram",  FPSPrintHistogram, bool, false);
@@ -428,7 +427,7 @@ private:
   DECL_GFX_PREF(Once, "layers.async-pan-zoom.separate-event-thread", AsyncPanZoomSeparateEventThread, bool, false);
   DECL_GFX_PREF(Live, "layers.bench.enabled",                  LayersBenchEnabled, bool, false);
   DECL_GFX_PREF(Once, "layers.bufferrotation.enabled",         BufferRotationEnabled, bool, true);
-  DECL_GFX_PREF(Live, "layers.shared-buffer-provider.enabled", PersistentBufferProviderSharedEnabled, bool, false);
+  DECL_GFX_PREF(Live, "layers.child-process-shutdown",         ChildProcessShutdown, bool, true);
 #ifdef MOZ_GFX_OPTIMIZE_MOBILE
   // If MOZ_GFX_OPTIMIZE_MOBILE is defined, we force component alpha off
   // and ignore the preference.
@@ -477,6 +476,8 @@ private:
   DECL_GFX_PREF(Once, "layers.prefer-d3d9",                    LayersPreferD3D9, bool, false);
   DECL_GFX_PREF(Once, "layers.prefer-opengl",                  LayersPreferOpenGL, bool, false);
   DECL_GFX_PREF(Live, "layers.progressive-paint",              ProgressivePaintDoNotUseDirectly, bool, false);
+  DECL_GFX_PREF(Live, "layers.shared-buffer-provider.enabled", PersistentBufferProviderSharedEnabled, bool, false);
+  DECL_GFX_PREF(Live, "layers.single-tile.enabled",            LayersSingleTileEnabled, bool, true);
   DECL_GFX_PREF(Once, "layers.stereo-video.enabled",           StereoVideoEnabled, bool, false);
 
   // We allow for configurable and rectangular tile size to avoid wasting memory on devices whose
@@ -493,7 +494,6 @@ private:
   DECL_GFX_PREF(Live, "layers.transaction.warning-ms",         LayerTransactionWarning, uint32_t, 200);
   DECL_GFX_PREF(Once, "layers.uniformity-info",                UniformityInfo, bool, false);
   DECL_GFX_PREF(Once, "layers.use-image-offscreen-surfaces",   UseImageOffscreenSurfaces, bool, true);
-  DECL_GFX_PREF(Live, "layers.single-tile.enabled",            LayersSingleTileEnabled, bool, true);
 
   DECL_GFX_PREF(Live, "layout.css.scroll-behavior.damping-ratio", ScrollBehaviorDampingRatio, float, 1.0f);
   DECL_GFX_PREF(Live, "layout.css.scroll-behavior.enabled",    ScrollBehaviorEnabled, bool, false);
@@ -511,6 +511,9 @@ private:
   // This and code dependent on it should be removed once containerless scrolling looks stable.
   DECL_GFX_PREF(Once, "layout.scroll.root-frame-containers",   LayoutUseContainersForRootFrames, bool, true);
 
+  DECL_GFX_PREF(Once, "media.hardware-video-decoding.force-enabled",
+                                                               HardwareVideoDecodingForceEnabled, bool, false);
+
   // These affect how line scrolls from wheel events will be accelerated.
   DECL_GFX_PREF(Live, "mousewheel.acceleration.factor",        MouseWheelAccelerationFactor, int32_t, -1);
   DECL_GFX_PREF(Live, "mousewheel.acceleration.start",         MouseWheelAccelerationStart, int32_t, -1);
@@ -564,9 +567,6 @@ private:
 
   DECL_GFX_PREF(Live, "webgl.webgl2-compat-mode",              WebGL2CompatMode, bool, false);
 
-  DECL_GFX_PREF(Once, "media.hardware-video-decoding.force-enabled",
-                                                               HardwareVideoDecodingForceEnabled, bool, false);
-
   // WARNING:
   // Please make sure that you've added your new preference to the list above in alphabetical order.
   // Please do not just append it to the end of the list.