--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -1646,21 +1646,23 @@ HTTP(..) == 621253-2-externalFilter.html
 random-if(winWidget) == 621918-1.svg 621918-1-ref.svg # 1-pixel diacritic positioning discrepancy in rotated text (may depend on platform fonts)
 random-if(winWidget) HTTP(..) == 621918-2.svg 621918-2-ref.svg # same 1px issue as above, and HTTP(..) for filters.svg, used to mask antialiasing issues where glyphs touch
 fuzzy-if(d2d,5,1) == 622585-1.html 622585-1-ref.html # bug 789402
 fuzzy-if(Android,8,300) fuzzy-if(skiaContent,1,40000) == 625409-1.html 625409-1-ref.html
 == 627393-1.html about:blank
 fuzzy-if(skiaContent,1,500) == 630835-1.html about:blank
 == 631352-1.html 631352-1-ref.html
 skip-if(!haveTestPlugin) fails-if(Android) fuzzy-if(winWidget&&!layersGPUAccelerated,102,535) fuzzy-if(skiaContent&&!Android,102,11000) HTTP == 632423-1.html 632423-1-ref.html
+pref(gfx.webrender.layers-free,true) skip-if(!webrender) == 632423-1.html 632423-1-ref.html
 skip-if(Android) random-if(winWidget||OSX==1010) == 632781-verybig.html 632781-ref.html
 == 632781-normalsize.html 632781-ref.html
 fuzzy-if(d2d&&/^Windows\x20NT\x206\.2/.test(http.oscpu),1,559) fuzzy-if(!isDebugBuild&&gtkWidget&&/^Linux\x20i686/.test(http.oscpu),102,140) == 633344-1.html 633344-1-ref.html # bug 1103623, Linux32 from GCC update
 fuzzy-if(skiaContent,1,500) == 634232-1.html 634232-1-ref.html
 fuzzy-if(skiaContent,3,120000) == 635302-1.html 635302-1-ref.html
+pref(gfx.webrender.layers-free,true) skip-if(!webrender) == 635302-1.html 635302-1-ref.html
 fuzzy(1,68) fuzzy-if(gtkWidget,1,70) fails-if(Android) fuzzy-if(skiaContent&&!Android,1,300) == 635373-1.html 635373-1-ref.html
 random-if(d2d) fails-if(Android) fuzzy-if(winWidget&&!d2d,20,118) fuzzy-if(skiaContent&&!Android,2,550) == 635373-2.html 635373-2-ref.html
 random-if(d2d) fails-if(Android) fuzzy-if(winWidget&&!d2d,20,116) fuzzy-if(skiaContent&&!Android,2,650) == 635373-3.html 635373-3-ref.html
 HTTP(..) == 635639-1.html 635639-1-ref.html
 HTTP(..) == 635639-2.html 635639-2-ref.html
 random == 637597-1.html 637597-1-ref.html # bug 637597 was never really fixed!
 fuzzy-if(Android,8,500) == 637852-1.html 637852-1-ref.html
 fuzzy-if(Android,8,500) fuzzy-if(skiaContent,3,1) fuzzy-if(webrender,3,19) == 637852-2.html 637852-2-ref.html

--- a/layout/reftests/css-animations/reftest.list
+++ b/layout/reftests/css-animations/reftest.list
@@ -38,16 +38,17 @@ fails-if(webrender) == stacking-context-
 == stacking-context-transform-none-in-delay.html stacking-context-animation-ref.html
 == stacking-context-transform-removing-important-in-delay.html stacking-context-animation-ref.html
 fails == background-position-in-delay.html background-position-ref.html # This test fails the reftest-opaque-layer check since animating background-position currently creates an active layer from its delay phse, and reftest-opaque-layer only handles items assigned to PaintedLayers.
 fails-if(webrender) == background-position-after-finish.html background-position-ref.html
 fails == background-position-running.html background-position-ref.html # This test fails the reftest-opaque-layer check since animating background-position currently creates an active layer, and reftest-opaque-layer only handles items assigned to PaintedLayers.
 fails == background-position-important.html background-position-ref.html # This test fails the reftest-opaque-layer check since animating background-position overridden by a non-animated !important style also creates an active layer, and reftest-opaque-layer only handles items that are assigned to PaintedLayers.
 
 == mask-position-after-finish-1a.html mask-anim-ref.html
+pref(gfx.webrender.layers-free,true) skip-if(!webrender) == mask-position-after-finish-1a.html mask-anim-ref.html
 == mask-position-after-finish-1b.html mask-anim-ref.html
 == mask-position-in-delay-1a.html mask-anim-ref.html
 == mask-position-in-delay-1b.html mask-anim-ref.html
 == mask-size-after-finish-1a.html mask-anim-ref.html
 == mask-size-after-finish-1b.html mask-anim-ref.html
 == mask-size-in-delay-1a.html mask-anim-ref.html
 == mask-size-in-delay-1b.html mask-anim-ref.html
 

--- a/layout/reftests/image/reftest.list
+++ b/layout/reftests/image/reftest.list
@@ -1,9 +1,10 @@
 fuzzy-if(Android,8,30) == background-image-zoom-1.html background-image-zoom-1-ref.html
+pref(gfx.webrender.layers-free,true) skip-if(!webrender) == background-image-zoom-1.html background-image-zoom-1-ref.html
 fails-if(usesRepeatResampling) == background-image-zoom-2.html about:blank
 == image-seam-1a.html image-seam-1-ref.html
 == image-seam-1b.html image-seam-1-ref.html
 fuzzy-if(Android,255,154) fuzzy-if(webrender,0-1,0-400) == image-seam-2.html  image-seam-2-ref.html  # Bug 1128229
 == image-zoom-1.html image-zoom-1-ref.html
 == image-zoom-2.html image-zoom-1-ref.html
 == invalid-url-image-1.html invalid-url-image-1-ref.html
 == sync-image-switch-1a.html sync-image-switch-1-ref.html

--- a/layout/reftests/invalidation/reftest.list
+++ b/layout/reftests/invalidation/reftest.list
@@ -81,16 +81,17 @@ pref(layers.single-tile.enabled,false) !
 == background-position-2d.html background-position-2-ref.html
 == background-position-2e.html background-position-2-ref.html
 == background-position-2f.html background-position-2-ref.html
 == zero-opacity-animation.html about:blank
 == zero-opacity-text.html about:blank
 == negative-w-component.html negative-w-component-ref.html
 
 == mask-invalidation-1a.html mask-invalidation-1-ref.html
+pref(gfx.webrender.layers-free,true) skip-if(!webrender) == mask-invalidation-1a.html mask-invalidation-1-ref.html
 == mask-invalidation-1b.html mask-invalidation-1-ref.html
 
 == mask-invalidation-2a.html mask-invalidation-2-ref.html
 == mask-invalidation-2b.html mask-invalidation-2-ref.html
 == mask-invalidation-2c.html mask-invalidation-2-ref.html
 == mask-invalidation-2d.html mask-invalidation-2-ref.html
 
 == clip-path-invalidation-1a.html mask-invalidation-2-ref.html

--- a/layout/reftests/transform/reftest.list
+++ b/layout/reftests/transform/reftest.list
@@ -26,31 +26,33 @@ fuzzy-if(webrender,1,27) == compound-1a.
 # matrices defined to be translations should act like position: relative
 == translatex-2.html translatex-1-ref.html
 == translatey-2.html translatey-1-ref.html
 # translate should act like position: relative
 != translate-1a.html translate-1-ref.html
 == translate-1b.html translate-1-ref.html
 == translate-1c.html translate-1-ref.html
 == translate-1d.html translate-1-ref.html
+pref(gfx.webrender.layers-free,true) skip-if(!webrender) == translate-1d.html translate-1-ref.html
 == translate-1e.html translate-1-ref.html
 == translate-2a.html translate-2-ref.html
 == translate-3.html translate-3-ref.html
 # rotate: Several rotations of the same object should be idempotent.  These
 # tests are currently disabled because of subpixel (< 0.00001 gfx units)
 # rounding errors.
 random == rotate-1a.html rotate-1-ref.html
 random == rotate-1b.html rotate-1-ref.html
 random == rotate-1c.html rotate-1-ref.html
 random == rotate-1d.html rotate-1-ref.html
 random == rotate-1e.html rotate-1-ref.html
 random == rotate-1f.html rotate-1-ref.html
 # rotate: 90deg rotations should be indistinguishable from objects constructed
 # to look the same.
 == rotate-2a.html rotate-2-ref.html
+pref(gfx.webrender.layers-free,true) skip-if(!webrender) == rotate-2a.html rotate-2-ref.html
 == rotate-2b.html rotate-2-ref.html
 # -transform-origin: We should NOT get the same images when using different
 # -transform-origins.
 != origin-1a.html origin-1-ref.html
 != origin-1b.html origin-1-ref.html
 # -transform-origin: We should get the same images when using equivalent
 # -transform-origins.
 == origin-2a.html origin-2-ref.html