--- a/layout/reftests/css-blending/reftest.list
+++ b/layout/reftests/css-blending/reftest.list
@@ -35,17 +35,17 @@ fuzzy-if(d2d,1,1600) fuzzy-if(azureSkia|
 fuzzy-if(d2d||azureSkia||gtkWidget,1,1600) pref(layout.css.background-blend-mode.enabled,true) == background-blending-screen.html background-blending-screen-ref.svg
 fuzzy-if(d2d||azureSkia||gtkWidget,10,4800) pref(layout.css.background-blend-mode.enabled,true) == background-blending-soft-light.html background-blending-soft-light-ref.svg
 
 fuzzy-if(azureSkia||d2d||gtkWidget,1,40000) pref(layout.css.background-blend-mode.enabled,true) == background-blending-image-color-959674.html background-blending-image-color-959674-ref.html
 
 #fuzzy due to inconsistencies in rounded rect cliping between parent and child; may be related to antialiasing. Between platforms, the max difference is the same, and the number of different pixels is either 36 or 37. (Win, Mac and Lin)
 fuzzy(64,53) pref(layout.css.mix-blend-mode.enabled,true) == mix-blend-mode-952051.html mix-blend-mode-952051-ref.html
 
-fuzzy-if(d3d11,49,200) pref(layout.css.mix-blend-mode.enabled,true) pref(layout.css.filters.enabled,true) == mix-blend-mode-and-filter.html mix-blend-mode-and-filter-ref.html
+fuzzy-if(d3d11,49,200) fuzzy-if(webrender,108-108,1236-1236) pref(layout.css.mix-blend-mode.enabled,true) pref(layout.css.filters.enabled,true) == mix-blend-mode-and-filter.html mix-blend-mode-and-filter-ref.html
 fuzzy-if(d3d11,1,3) pref(layout.css.mix-blend-mode.enabled,true) pref(layout.css.filters.enabled,true) == mix-blend-mode-and-filter.svg mix-blend-mode-and-filter-ref.svg
 
 fuzzy(2,14400) pref(layout.css.mix-blend-mode.enabled,true) == mix-blend-mode-child-of-blended-has-opacity.html mix-blend-mode-child-of-blended-has-opacity-ref.html
 
 pref(layout.css.mix-blend-mode.enabled,true) == mix-blend-mode-nested-976533.html mix-blend-mode-nested-976533-ref.html
 pref(layout.css.mix-blend-mode.enabled,true) == mix-blend-mode-culling-1207041.html mix-blend-mode-culling-1207041-ref.html
 pref(layout.css.mix-blend-mode.enabled,true) == mix-blend-mode-dest-alpha-1135271.html mix-blend-mode-dest-alpha-1135271-ref.html
 == clipped-mixblendmode-containing-unclipped-stuff.html clipped-mixblendmode-containing-unclipped-stuff-ref.html

--- a/layout/reftests/svg/filters/css-filter-chains/reftest.list
+++ b/layout/reftests/svg/filters/css-filter-chains/reftest.list
@@ -1,9 +1,9 @@
 # These tests verify that CSS filter chains behave properly.
 # e.g. filter: blur(3px) grayscale(0.5) invert(0.2);
 
 default-preferences pref(layout.css.filters.enabled,true)
 
 # Some platforms render this complex filter chain a little differently, and that's ok.
 fuzzy(5,13000) fuzzy-if(/^Windows\x20NT\x2010\.0/.test(http.oscpu)&&layersGPUAccelerated,35,13057) == long-chain.html long-chain-ref.html # Win10: Bug 1258241
 == moz-element.html moz-element-ref.html
-== same-filter.html same-filter-ref.html
+fuzzy-if(webrender,52-52,8312-8312) == same-filter.html same-filter-ref.html

--- a/layout/reftests/svg/filters/css-filters/reftest.list
+++ b/layout/reftests/svg/filters/css-filters/reftest.list
@@ -1,23 +1,23 @@
 # These tests verify that CSS filters behave properly.
 # e.g. filter: blur(3px)
 
 default-preferences pref(layout.css.filters.enabled,true)
 
-== blur.html blur-ref.html
+fuzzy-if(webrender,39-39,6308-6308) == blur.html blur-ref.html
 == blur.svg blur-ref.svg
 == blur-calc.html blur-calc-ref.html
 == blur-calc-negative.html blur-calc-negative-ref.html
 skip-if(d2d) == blur-cap-large-radius-on-software.html blur-cap-large-radius-on-software-ref.html
-== blur-em-radius.html blur-em-radius-ref.html
+fuzzy-if(webrender,39-39,6308-6308) == blur-em-radius.html blur-em-radius-ref.html
 == blur-invalid-radius.html blur-invalid-radius-ref.html
-== blur-rem-radius.html blur-rem-radius-ref.html
+fuzzy-if(webrender,39-39,6308-6308) == blur-rem-radius.html blur-rem-radius-ref.html
 == blur-zero-radius.html blur-zero-radius-ref.html
-== blur-zoomed-page.html blur-zoomed-page-ref.html
+fuzzy-if(webrender,39-39,25156-25156) == blur-zoomed-page.html blur-zoomed-page-ref.html
 == brightness.html brightness-ref.html
 == brightness-darken.html brightness-darken-ref.html
 == brightness-extreme.html brightness-extreme-ref.html
 == brightness-one.html brightness-one-ref.html
 == brightness-percent.html brightness-percent-ref.html
 == brightness-zero.html brightness-zero-ref.html
 == containing-block-1.html containing-block-1-ref.html
 == contrast.html contrast-ref.html

--- a/layout/reftests/svg/svg-integration/reftest.list
+++ b/layout/reftests/svg/svg-integration/reftest.list
@@ -44,9 +44,9 @@ fuzzy(1,5000) == mask-clipPath-opacity-0
 fuzzy(1,5000) == mask-clipPath-opacity-01d.xhtml mask-clipPath-opacity-01-ref.xhtml
 fuzzy(1,5000) == mask-clipPath-opacity-01e.xhtml mask-clipPath-opacity-01-ref.xhtml
 
 == transform-outer-svg-01.xhtml transform-outer-svg-01-ref.xhtml
 
 # box-decoration-break tests
 fuzzy-if(Android,4,10) == box-decoration-break-01.xhtml box-decoration-break-01-ref.xhtml
 fuzzy(62,14) == box-decoration-break-02.xhtml box-decoration-break-02-ref.xhtml
-fuzzy(67,234) fails-if(webrender) == box-decoration-break-03.xhtml box-decoration-break-01-ref.xhtml
+fuzzy(67,234) == box-decoration-break-03.xhtml box-decoration-break-01-ref.xhtml