--- a/layout/style/nsStyleStruct.cpp
+++ b/layout/style/nsStyleStruct.cpp
@@ -2966,17 +2966,22 @@ nsStyleDisplay::nsStyleDisplay(StyleStru
   , mScrollSnapTypeX(NS_STYLE_SCROLL_SNAP_TYPE_NONE)
   , mScrollSnapTypeY(NS_STYLE_SCROLL_SNAP_TYPE_NONE)
   , mScrollSnapPointsX(eStyleUnit_None)
   , mScrollSnapPointsY(eStyleUnit_None)
   , mBackfaceVisibility(NS_STYLE_BACKFACE_VISIBILITY_VISIBLE)
   , mTransformStyle(NS_STYLE_TRANSFORM_STYLE_FLAT)
   , mTransformBox(NS_STYLE_TRANSFORM_BOX_BORDER_BOX)
   , mSpecifiedTransform(nullptr)
+  , mTransformOrigin{ {0.5f, eStyleUnit_Percent}, // Transform is centered on origin
+                      {0.5f, eStyleUnit_Percent},
+                      {0, nsStyleCoord::CoordConstructor} }
   , mChildPerspective(eStyleUnit_None)
+  , mPerspectiveOrigin{ {0.5f, eStyleUnit_Percent},
+                        {0.5f, eStyleUnit_Percent} }
   , mVerticalAlign(NS_STYLE_VERTICAL_ALIGN_BASELINE, eStyleUnit_Enumerated)
   , mTransitions(nsStyleAutoArray<StyleTransition>::WITH_SINGLE_INITIAL_ELEMENT)
   , mTransitionTimingFunctionCount(1)
   , mTransitionDurationCount(1)
   , mTransitionDelayCount(1)
   , mTransitionPropertyCount(1)
   , mAnimations(nsStyleAutoArray<StyleAnimation>::WITH_SINGLE_INITIAL_ELEMENT)
   , mAnimationTimingFunctionCount(1)
@@ -2984,21 +2989,16 @@ nsStyleDisplay::nsStyleDisplay(StyleStru
   , mAnimationDelayCount(1)
   , mAnimationNameCount(1)
   , mAnimationDirectionCount(1)
   , mAnimationFillModeCount(1)
   , mAnimationPlayStateCount(1)
   , mAnimationIterationCountCount(1)
 {
   MOZ_COUNT_CTOR(nsStyleDisplay);
-  mTransformOrigin[0].SetPercentValue(0.5f); // Transform is centered on origin
-  mTransformOrigin[1].SetPercentValue(0.5f);
-  mTransformOrigin[2].SetCoordValue(0);
-  mPerspectiveOrigin[0].SetPercentValue(0.5f);
-  mPerspectiveOrigin[1].SetPercentValue(0.5f);
 
   // Initial value for mScrollSnapDestination is "0px 0px"
   mScrollSnapDestination.SetInitialZeroValues();
 
   mTransitions[0].SetInitialValues();
   mAnimations[0].SetInitialValues();
 }
 
@@ -3031,17 +3031,22 @@ nsStyleDisplay::nsStyleDisplay(const nsS
   , mScrollSnapPointsX(aSource.mScrollSnapPointsX)
   , mScrollSnapPointsY(aSource.mScrollSnapPointsY)
   , mScrollSnapDestination(aSource.mScrollSnapDestination)
   , mScrollSnapCoordinate(aSource.mScrollSnapCoordinate)
   , mBackfaceVisibility(aSource.mBackfaceVisibility)
   , mTransformStyle(aSource.mTransformStyle)
   , mTransformBox(aSource.mTransformBox)
   , mSpecifiedTransform(aSource.mSpecifiedTransform)
+  , mTransformOrigin{ aSource.mTransformOrigin[0],
+                      aSource.mTransformOrigin[1],
+                      aSource.mTransformOrigin[2] }
   , mChildPerspective(aSource.mChildPerspective)
+  , mPerspectiveOrigin{ aSource.mPerspectiveOrigin[0],
+                        aSource.mPerspectiveOrigin[1] }
   , mVerticalAlign(aSource.mVerticalAlign)
   , mTransitions(aSource.mTransitions)
   , mTransitionTimingFunctionCount(aSource.mTransitionTimingFunctionCount)
   , mTransitionDurationCount(aSource.mTransitionDurationCount)
   , mTransitionDelayCount(aSource.mTransitionDelayCount)
   , mTransitionPropertyCount(aSource.mTransitionPropertyCount)
   , mAnimations(aSource.mAnimations)
   , mAnimationTimingFunctionCount(aSource.mAnimationTimingFunctionCount)
@@ -3050,23 +3055,16 @@ nsStyleDisplay::nsStyleDisplay(const nsS
   , mAnimationNameCount(aSource.mAnimationNameCount)
   , mAnimationDirectionCount(aSource.mAnimationDirectionCount)
   , mAnimationFillModeCount(aSource.mAnimationFillModeCount)
   , mAnimationPlayStateCount(aSource.mAnimationPlayStateCount)
   , mAnimationIterationCountCount(aSource.mAnimationIterationCountCount)
   , mShapeOutside(aSource.mShapeOutside)
 {
   MOZ_COUNT_CTOR(nsStyleDisplay);
-
-  /* Copy over transform origin. */
-  mTransformOrigin[0] = aSource.mTransformOrigin[0];
-  mTransformOrigin[1] = aSource.mTransformOrigin[1];
-  mTransformOrigin[2] = aSource.mTransformOrigin[2];
-  mPerspectiveOrigin[0] = aSource.mPerspectiveOrigin[0];
-  mPerspectiveOrigin[1] = aSource.mPerspectiveOrigin[1];
 }
 
 nsChangeHint
 nsStyleDisplay::CalcDifference(const nsStyleDisplay& aNewData) const
 {
   nsChangeHint hint = nsChangeHint(0);
 
   if (!DefinitelyEqualURIsAndPrincipal(mBinding, aNewData.mBinding)