--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -1854,17 +1854,17 @@ test-pref(layout.css.grid.enabled,true) 
 == 1059498-1.html 1059498-1-ref.html
 == 1059498-2.html 1059498-1-ref.html
 == 1059498-3.html 1059498-1-ref.html
 == 1062108-1.html 1062108-1-ref.html
 == 1062792-1.html 1062792-1-ref.html
 == 1062963-floatmanager-reflow.html 1062963-floatmanager-reflow-ref.html
 test-pref(dom.webcomponents.enabled,true) == 1066554-1.html 1066554-1-ref.html
 == 1069716-1.html 1069716-1-ref.html
-random-if(webrender) == 1078262-1.html about:blank
+fails-if(webrender) == 1078262-1.html about:blank
 test-pref(layout.testing.overlay-scrollbars.always-visible,false) == 1081072-1.html 1081072-1-ref.html
 == 1081185-1.html 1081185-1-ref.html
 == 1097437-1.html 1097437-1-ref.html
 == 1103258-1.html 1103258-1-ref.html # assertion crash test with layers culling test
 == 1105137-1.html 1105137-1-ref.html
 fuzzy-if(d2d,36,304) fuzzy-if(/^Windows\x20NT\x2010\.0/.test(http.oscpu)&&d2d,127,701) HTTP(..) == 1116480-1-fakeitalic-overflow.html 1116480-1-fakeitalic-overflow-ref.html
 == 1111753-1.html about:blank
 == 1114526-1.html 1114526-1-ref.html
@@ -2018,18 +2018,18 @@ fails-if(!stylo||styloVsGecko) == 136516
 == 1375315-3.html 1375315-3-ref.html
 == 1375315-4.html 1375315-4-ref.html
 == 1375315-5.html 1375315-5-ref.html
 == 1375315-6.html 1375315-6-ref.html
 == 1375315-7.html 1375315-7-ref.html
 == 1375315-8.html 1375315-8-ref.html
 == 1375315-9.html 1375315-9-ref.html
 == 1375315-10.html 1375315-10-ref.html
-random-if(webrender) == 1375315-11.html 1375315-11-ref.html
-random-if(webrender) == 1375315-12.html 1375315-12-ref.html
+== 1375315-11.html 1375315-11-ref.html
+== 1375315-12.html 1375315-12-ref.html
 == 1374062.html 1374062-ref.html
 == 1375513.html 1375513-ref.html
 == 1375674.html 1375674-ref.html
 == 1372041.html 1372041-ref.html
 == 1376092.html 1376092-ref.html
 needs-focus == 1377447-1.html 1377447-1-ref.html
 needs-focus != 1377447-1.html 1377447-2.html
 == 1379041.html 1379041-ref.html

--- a/layout/reftests/svg/smil/reftest.list
+++ b/layout/reftests/svg/smil/reftest.list
@@ -117,17 +117,17 @@ fuzzy-if(skiaContent,1,600) == anim-feGa
 # animate some <integer> attributes:
 == anim-feTurbulence-numOctaves-01.svg anim-feTurbulence-numOctaves-01-ref.svg
 
 # animate some <integer-optional-integer> attributes:
 == anim-feConvolveMatrix-order-01.svg anim-feConvolveMatrix-order-01-ref.svg
 
 # animate some <angle> attributes:
 == anim-marker-orient-01.svg lime.svg
-random-if(webrender) == anim-marker-orient-02.svg lime.svg
+== anim-marker-orient-02.svg lime.svg
 
 #animate points list:
 == anim-polygon-points-01.svg anim-polygon-points-01-ref.svg
 == anim-polyline-points-01.svg anim-polyline-points-01-ref.svg
 
 # animate path data:
 == anim-path-d-01.svg anim-path-d-01-ref.svg
 
@@ -230,17 +230,17 @@ skip == anim-text-x-y-dx-dy-01.svg anim-
 == anim-y-interp-2.svg anim-y-interp-2-ref.svg
 == anim-y-interp-3.svg anim-y-interp-3-ref.svg
 == anim-y-interp-4.svg anim-y-interp-4-ref.svg
 == anim-y-interp-5.svg anim-y-interp-5-ref.svg
 == anim-y-interp-6.svg anim-y-interp-6-ref.svg
 
 # Test we don't rely on HasAttr to see if an attribute has been set
 == anim-rect-rxry-1.svg anim-rect-rxry-1-ref.svg
-random-if(webrender) == anim-pattern-attr-presence-01.svg anim-pattern-attr-presence-01-ref.svg
+fuzzy-if(webrender,1,350) == anim-pattern-attr-presence-01.svg anim-pattern-attr-presence-01-ref.svg
 fails == anim-pattern-attr-presence-02.svg anim-pattern-attr-presence-02-ref.svg
 # ^ bug 621651
 fuzzy-if(cocoaWidget&&layersGPUAccelerated,1,2) == anim-gradient-attr-presence-01.svg anim-gradient-attr-presence-01-ref.svg
 
 == api-sanity-1.svg lime.svg
 
 == freeze-applied-late-1.svg anim-standard-ref.svg
 == freeze-applied-late-2.svg anim-standard-ref.svg

--- a/layout/reftests/writing-mode/reftest.list
+++ b/layout/reftests/writing-mode/reftest.list
@@ -29,17 +29,17 @@ fails == 1102175-1a.html 1102175-1-ref.h
 == 1103613-1.html 1103613-1-ref.html
 == 1105268-1-min-max-dimensions.html 1105268-1-min-max-dimensions-ref.html
 == 1105268-2-min-max-dimensions.html 1105268-2-min-max-dimensions-ref.html
 == 1106669-1-intrinsic-for-container.html 1106669-1-intrinsic-for-container-ref.html
 == 1108923-1-percentage-margins.html 1108923-1-percentage-margins-ref.html
 == 1111944-1-list-marker.html 1111944-1-list-marker-ref.html
 fuzzy(116,94) fuzzy-if(winWidget,135,124) HTTP(..) == 1115916-1-vertical-metrics.html 1115916-1-vertical-metrics-ref.html
 == 1117210-1-vertical-baseline-snap.html 1117210-1-vertical-baseline-snap-ref.html
-random-if(webrender) == 1117227-1-text-overflow.html 1117227-1-text-overflow-ref.html
+== 1117227-1-text-overflow.html 1117227-1-text-overflow-ref.html
 == 1122366-1-margin-collapse.html 1122366-1-margin-collapse-ref.html
 == 1124636-1-fieldset-max-height.html 1124636-1-fieldset-max-height-ref.html
 == 1124636-2-fieldset-min-height.html 1124636-2-fieldset-min-height-ref.html
 
 == ua-style-sheet-margin-1.html ua-style-sheet-margin-1-ref.html
 == ua-style-sheet-margin-2.html ua-style-sheet-margin-2-ref.html
 == ua-style-sheet-margin-3.html ua-style-sheet-margin-3-ref.html
 == ua-style-sheet-margin-4.html ua-style-sheet-margin-4-ref.html