--- a/layout/reftests/border-radius/reftest.list
+++ b/layout/reftests/border-radius/reftest.list
@@ -18,33 +18,33 @@
 # ridge/groove borders
 
 # percent units
 == percent-1.html percent-1-ref.html
 fuzzy-if(skiaContent,1,342) == percent-2.html percent-2-ref.html
 fuzzy-if(skiaContent,1,343) == percent-3.html percent-3-ref.html
 
 # more serious tests, using SVG reference
-fuzzy-if(skiaContent,17,58) fuzzy-if(webrender,42-42,66-66) == border-circle-2.html border-circle-2-ref.xhtml
-fuzzy-if(gtkWidget,14,280) fuzzy-if(cocoaWidget,4,582) fuzzy-if(Android,36,264) fuzzy-if(d2d,51,323) fuzzy-if(winWidget&&!d2d,16,377) fuzzy-if(skiaContent,63,398) fuzzy-if(webrender,64-64,897-897) == curved-stripe-border.html curved-stripe-border-ref.svg # bug 459945
+fuzzy-if(skiaContent,17,58) fuzzy-if(webrender,30-30,70-70) == border-circle-2.html border-circle-2-ref.xhtml
+fuzzy-if(gtkWidget,14,280) fuzzy-if(cocoaWidget,4,582) fuzzy-if(Android,36,264) fuzzy-if(d2d,51,323) fuzzy-if(winWidget&&!d2d,16,377) fuzzy-if(skiaContent,63,398) fuzzy-if(webrender,62-62,930-930) == curved-stripe-border.html curved-stripe-border-ref.svg # bug 459945
 
 # Corners
-fuzzy-if(skiaContent,17,47) fuzzy-if(webrender,42-42,52-52) == corner-1.html corner-1-ref.svg # bottom corners different radius than top corners
-fuzzy-if(gtkWidget,23,5) fuzzy-if(winWidget&&!d2d,23,5) fuzzy-if(d2d,32,8) fuzzy-if(Android,10,8) fuzzy-if(skiaContent,18,49) fuzzy-if(webrender,42-42,51-51) == corner-2.html corner-2-ref.svg # right corners different radius than left corners; see bug 500804
+fuzzy-if(skiaContent,17,47) fuzzy-if(webrender,30-30,58-58) == corner-1.html corner-1-ref.svg # bottom corners different radius than top corners
+fuzzy-if(gtkWidget,23,5) fuzzy-if(winWidget&&!d2d,23,5) fuzzy-if(d2d,32,8) fuzzy-if(Android,10,8) fuzzy-if(skiaContent,18,49) fuzzy-if(webrender,30-30,57-57) == corner-2.html corner-2-ref.svg # right corners different radius than left corners; see bug 500804
 fuzzy-if(gtkWidget,3,10) fuzzy-if(winWidget&&!d2d,3,10) fuzzy-if(d2d,15,32) fuzzy-if(Android,3,15) fuzzy-if(skiaContent,18,90) fails-if(webrender) == corner-3.html corner-3-ref.svg
-fuzzy-if(skiaContent,12,83) fuzzy-if(webrender,19-19,96-96) == corner-4.html corner-4-ref.svg
+fuzzy-if(skiaContent,12,83) fuzzy-if(webrender,13-13,104-104) == corner-4.html corner-4-ref.svg
 
 # Test that radii too long are reduced
 == border-reduce-height.html border-reduce-height-ref.html
 
 # Tests for border clipping
 fails == clipping-1.html clipping-1-ref.html # background color should completely fill box; bug 466572
 != clipping-2.html about:blank # background color clipped to inner/outer border, can't get
 # great tests for this due to antialiasing problems described in bug 466572
-fuzzy-if(skiaContent,17,62) fuzzy-if(webrender,42-42,66-66) == clipping-3.html clipping-3-ref.xhtml # edge of border-radius clips an underlying object's background
+fuzzy-if(skiaContent,17,62) fuzzy-if(webrender,30-30,70-70) == clipping-3.html clipping-3-ref.xhtml # edge of border-radius clips an underlying object's background
 
 # Tests for clipping the contents of replaced elements and overflow!=visible
 != clipping-4-ref.html clipping-4-notref.html
 fuzzy-if(true,1,20) fuzzy-if(d2d,72,196) fuzzy-if(cocoaWidget,1,180) fuzzy-if(Android,140,237) == clipping-4-canvas.html clipping-4-ref.html # bug 732535
 fuzzy-if(Android,5,54) fuzzy-if(/^Windows\x20NT\x206\.2/.test(http.oscpu),1,10) fuzzy-if(skiaContent,1,172) == clipping-4-image.html clipping-4-ref.html
 fuzzy-if(/^Windows\x20NT\x206\.2/.test(http.oscpu),1,10) fuzzy-if(skiaContent,1,77) == clipping-4-overflow-hidden.html clipping-4-ref.html
 == clipping-5-canvas.html clipping-5-refc.html
 fuzzy-if(/^Windows\x20NT\x206\.2/.test(http.oscpu),1,5) == clipping-5-image.html clipping-5-refi.html

--- a/layout/reftests/box-shadow/reftest.list
+++ b/layout/reftests/box-shadow/reftest.list
@@ -9,17 +9,17 @@ random != boxshadow-blur-2.html boxshado
 == tableboxshadow-trshadow.html tableboxshadow-trshadow-ref.html
 == tableboxshadow-tdshadow.html tableboxshadow-tdshadow-ref.html
 == boxshadow-rounding.html boxshadow-rounding-ref.html
 # One uses old path, one uses WR box shadow.
 fails-if(Android) == boxshadow-button.html boxshadow-button-ref.html
 fuzzy-if(OSX==1010,1,24) fuzzy-if(d2d,16,908) fuzzy-if(webrender,47-47,1080-1080) == boxshadow-large-border-radius.html boxshadow-large-border-radius-ref.html # Bug 1209649
 
 fails-if(Android) == boxshadow-fileupload.html boxshadow-fileupload-ref.html
-fuzzy-if(skiaContent,13,28) fuzzy-if(webrender,25,49) == boxshadow-inner-basic.html boxshadow-inner-basic-ref.svg
+fuzzy-if(skiaContent,13,28) fuzzy-if(webrender,19-19,50-50) == boxshadow-inner-basic.html boxshadow-inner-basic-ref.svg
 random-if(layersGPUAccelerated) == boxshadow-mixed.html boxshadow-mixed-ref.html
 == boxshadow-mixed-2.html boxshadow-mixed-2-ref.html
 random-if(d2d) fuzzy-if(skiaContent,1,100) fuzzy-if(webrender,127,3528) == boxshadow-rounded-spread.html boxshadow-rounded-spread-ref.html
 fuzzy-if(skiaContent,1,50) == boxshadow-dynamic.xul boxshadow-dynamic-ref.xul
 random-if(d2d) == boxshadow-onecorner.html boxshadow-onecorner-ref.html
 random-if(d2d) == boxshadow-twocorners.html boxshadow-twocorners-ref.html
 random-if(d2d) == boxshadow-threecorners.html boxshadow-threecorners-ref.html
 fuzzy(2,440) fails-if(webrender) == boxshadow-skiprect.html boxshadow-skiprect-ref.html
@@ -35,14 +35,14 @@ fuzzy(26,3610) fuzzy-if(d2d,26,5910) fuz
 # fuzzy due to blur going inside, but as long as it's essentially black instead of a light gray its ok.
 fuzzy(13,9445) fuzzy-if(d2d,13,10926) fails-if(webrender) == boxshadow-inset-large-offset.html boxshadow-inset-large-offset-ref.html
 
 == overflow-not-scrollable-1.html overflow-not-scrollable-1-ref.html
 == overflow-not-scrollable-1.html overflow-not-scrollable-1-ref2.html
 == overflow-not-scrollable-2.html overflow-not-scrollable-2-ref.html
 fuzzy-if(webrender,1,655) == 611574-1.html 611574-1-ref.html
 fuzzy-if(webrender,4,144) == 611574-2.html 611574-2-ref.html
-fuzzy-if(winWidget,5,30) fuzzy-if(skiaContent,16,10) fuzzy-if(webrender,53-53,80-80) == fieldset.html fieldset-ref.html # minor anti-aliasing problem on Windows
+fuzzy-if(winWidget,5,30) fuzzy-if(skiaContent,16,10) fuzzy-if(webrender,34-34,82-82) == fieldset.html fieldset-ref.html # minor anti-aliasing problem on Windows
 fuzzy-if(winWidget,5,30) fuzzy-if(skiaContent,16,10) fails-if(webrender) == fieldset-inset.html fieldset-inset-ref.html # minor anti-aliasing problem on Windows
 == 1178575.html 1178575-ref.html
 == 1178575-2.html 1178575-2-ref.html
 fuzzy(159,2) fails-if(!dwrite) == 1212823-1.html 1212823-1-ref.html
 == boxshadow-large-offset.html boxshadow-large-offset-ref.html

--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -1194,17 +1194,17 @@ fuzzy-if(webrender,4,361) == 449519-1.ht
 == 455105-2.html 455105-ref.html
 == 455171-5.html 455171-5-ref.html
 == 455280-1.xhtml 455280-1-ref.xhtml
 == 455826-1.html 455826-1-ref.html
 fails-if(Android||cocoaWidget) == 456147.xul 456147-ref.html # bug 458047
 fuzzy-if(Android,11,41) fuzzy-if(winWidget||gtkWidget,4,6) fuzzy-if(d2d,4,69) fuzzy-if(skiaContent,42,150) == 456219-1a.html 456219-1-ref.html # bug 1128229
 fuzzy-if(Android,11,41) fuzzy-if(winWidget||gtkWidget,4,6) fuzzy-if(d2d,4,69) fuzzy-if(skiaContent,42,150) == 456219-1b.html 456219-1-ref.html # bug 1128229
 fuzzy-if(Android,11,41) fuzzy-if(winWidget||gtkWidget,4,6) fuzzy-if(d2d,4,69) fuzzy-if(skiaContent,42,150) == 456219-1c.html 456219-1-ref.html # bug 1128229
-fuzzy-if(skiaContent,1,45) == 456219-2.html 456219-2-ref.html
+fuzzy-if(skiaContent,1,45) fuzzy-if(webrender,9-9,8-8) == 456219-2.html 456219-2-ref.html
 == 456330-1.gif 456330-1-ref.png
 == 456484-1.html 456484-1-ref.html
 == 457398-1.html 457398-1-ref.html
 == 457398-2.html 457398-2-ref.html
 == 458296-1a.html 458296-1a-ref.html
 == 458296-1b.html 458296-1-ref.html
 == 458296-1c.html 458296-1-ref.html
 == 458296-1d.html 458296-1-ref.html

--- a/layout/reftests/css-break/reftest.list
+++ b/layout/reftests/css-break/reftest.list
@@ -1,12 +1,12 @@
 default-preferences pref(layout.css.box-decoration-break.enabled,true)
 
 == box-decoration-break-1.html box-decoration-break-1-ref.html
-fuzzy(1,20) fuzzy-if(skiaContent,1,700) fuzzy-if(webrender,6-6,8644-8796) == box-decoration-break-with-inset-box-shadow-1.html box-decoration-break-with-inset-box-shadow-1-ref.html
+fuzzy(1,20) fuzzy-if(skiaContent,1,700) fuzzy-if(webrender,11-11,8772-8924) == box-decoration-break-with-inset-box-shadow-1.html box-decoration-break-with-inset-box-shadow-1-ref.html
 fuzzy(45,460) fuzzy-if(skiaContent,57,439) fuzzy-if(Android,57,1330) fuzzy-if(styloVsGecko,45,1410) == box-decoration-break-with-outset-box-shadow-1.html box-decoration-break-with-outset-box-shadow-1-ref.html # Bug 1386543
 random-if(!gtkWidget) == box-decoration-break-border-image.html box-decoration-break-border-image-ref.html
 == box-decoration-break-block-border-padding.html box-decoration-break-block-border-padding-ref.html
 == box-decoration-break-block-margin.html box-decoration-break-block-margin-ref.html
 fuzzy-if(!Android,1,62) fuzzy-if(Android,8,6627) == box-decoration-break-first-letter.html box-decoration-break-first-letter-ref.html #Bug 1313773
 == box-decoration-break-with-bidi.html box-decoration-break-with-bidi-ref.html
 == box-decoration-break-bug-1235152.html box-decoration-break-bug-1235152-ref.html
 == box-decoration-break-bug-1249913.html box-decoration-break-bug-1249913-ref.html

--- a/layout/reftests/image-element/reftest.list
+++ b/layout/reftests/image-element/reftest.list
@@ -15,19 +15,19 @@ fails-if(azureSkia) fails-if(cocoaWidget
 random-if(d2d) == element-paint-transform-02.html element-paint-transform-02-ref.html # bug 587133
 fuzzy-if(d2d&&/^Windows\x20NT\x206\.1/.test(http.oscpu),16,90) == element-paint-background-size-01.html element-paint-background-size-01-ref.html
 == element-paint-background-size-02.html element-paint-background-size-02-ref.html
 fuzzy-if(skiaContent,255,4) == element-paint-transform-repeated.html element-paint-transform-repeated-ref.html
 fuzzy-if(d2d,255,24) == element-paint-transform-03.html element-paint-transform-03-ref.html
 fuzzy-if(asyncPan,2,140) fuzzy-if(skiaContent,3,106) == element-paint-native-widget.html element-paint-native-widget-ref.html   # in -ref the scrollframe is active and layerized differently with APZ
 fails-if(usesRepeatResampling) == element-paint-subimage-sampling-restriction.html about:blank
 == element-paint-clippath.html element-paint-clippath-ref.html
-fuzzy-if(webrender,51-51,723-723) == element-paint-sharpness-01a.html element-paint-sharpness-01b.html
+fuzzy-if(webrender,35-35,706-706) == element-paint-sharpness-01a.html element-paint-sharpness-01b.html
 fuzzy-if(skiaContent,1,326) == element-paint-sharpness-01b.html element-paint-sharpness-01c.html
-fuzzy-if(webrender,51-51,723-723) == element-paint-sharpness-01c.html element-paint-sharpness-01d.html
+fuzzy-if(webrender,35-35,706-706) == element-paint-sharpness-01c.html element-paint-sharpness-01d.html
 == element-paint-sharpness-02a.html element-paint-sharpness-02b.html
 == element-paint-sharpness-02b.html element-paint-sharpness-02c.html
 == element-paint-paintserversize-rounding-01.html element-paint-paintserversize-rounding-01-ref.html
 fuzzy-if(skiaContent,187,1191) == element-paint-paintserversize-rounding-02.html element-paint-paintserversize-rounding-02-ref.html # Linux32 from GCC update
 == element-paint-multiple-backgrounds-01a.html element-paint-multiple-backgrounds-01-ref.html
 == element-paint-multiple-backgrounds-01b.html element-paint-multiple-backgrounds-01-ref.html
 == element-paint-multiple-backgrounds-01c.html element-paint-multiple-backgrounds-01-ref.html
 == gradient-html-01.html gradient-html-01-ref.svg

--- a/layout/reftests/svg/svg-integration/clip-path/reftest.list
+++ b/layout/reftests/svg/svg-integration/clip-path/reftest.list
@@ -49,13 +49,13 @@ fuzzy-if(webrender,64-64,1106-1106) == c
 
 == clip-path-inset-001a.html clip-path-inset-001-ref.html
 == clip-path-inset-001b.html clip-path-inset-001-ref.html
 == clip-path-inset-001c.html clip-path-inset-001-ref.html
 # Anti-aliasing behavior for masking and borders is different
 fuzzy(64,146) == clip-path-inset-002a.html clip-path-inset-002-ref.html
 fuzzy(64,146) == clip-path-inset-002b.html clip-path-inset-002-ref.html
 fuzzy(64,146) == clip-path-inset-002c.html clip-path-inset-002-ref.html
-fuzzy(64,340) fuzzy-if(webrender,72-72,292-292) == clip-path-inset-003.html clip-path-inset-003-ref.html
+fuzzy(64,340) fuzzy-if(webrender,69-69,292-292) == clip-path-inset-003.html clip-path-inset-003-ref.html
 
 == clip-path-stroke-001.html clip-path-stroke-001-ref.html
 
 == clip-path-transform-001.html clip-path-transform-001-ref.html