--- a/layout/reftests/bugs/reftest-stylo.list
+++ b/layout/reftests/bugs/reftest-stylo.list
@@ -456,17 +456,17 @@ fails == 338251-pre-oh.html 338251-pre-o
 == 341043-1a.html 341043-1a.html
 == 341043-1b.html 341043-1b.html
 == 343538-1.html 343538-1.html
 == 343540-1.html 343540-1.html
 fails == 345267-1a.html 345267-1a.html
 fails == 345267-1b.html 345267-1b.html
 fails == 345267-1c.html 345267-1c.html
 fails == 345267-1d.html 345267-1d.html
-fails == 345563-sub.xhtml 345563-sub.xhtml
+== 345563-sub.xhtml 345563-sub.xhtml
 == 346189-1.xul 346189-1.xul
 fails == 346774-1a.html 346774-1a.html
 fails == 346774-1b.html 346774-1b.html
 fails == 346774-1c.html 346774-1c.html
 == 347348-1.xhtml 347348-1.xhtml
 fails == 347496-1.xhtml 347496-1.xhtml
 == 347912-1.html 347912-1.html
 fails == 348049-1.xhtml 348049-1.xhtml
@@ -976,17 +976,17 @@ fails == 412352-2.html 412352-2.html
 == 413292-1.html 413292-1.html
 == 413361-1.html 413361-1.html
 == 413840-background-unchanged.html 413840-background-unchanged.html
 == 413840-ltr-offsets.html 413840-ltr-offsets.html
 == 413840-rtl-offsets.html 413840-rtl-offsets.html
 fails == 413840-pushed-line-bullet.html 413840-pushed-line-bullet.html
 == 413840-bullet-first-line.html 413840-bullet-first-line.html
 == 413982.html 413982.html
-fails == 414123.xhtml 414123.xhtml
+== 414123.xhtml 414123.xhtml
 == 414638.html 414638.html
 fails == 414851-1.html 414851-1.html
 fails == 416106-1.xhtml 416106-1.xhtml
 == 416752-1.html 416752-1.html
 == 417178-1.html 417178-1.html
 == 417246-1.html 417246-1.html
 == 417676.html 417676.html
 asserts-if(stylo,1-2) == 418574-1.html 418574-1.html # bug 478135

--- a/layout/reftests/mathml/reftest-stylo.list
+++ b/layout/reftests/mathml/reftest-stylo.list
@@ -1,35 +1,35 @@
 # DO NOT EDIT! This is a auto-generated temporary list for Stylo testing
 == dir-1.html dir-1.html
 == dir-2.html dir-2.html
 random-if(gtkWidget) == dir-3.html dir-3.html
 == dir-4.html dir-4.html
 == dir-5.html dir-5.html
 fails == dir-6.html dir-6.html
 fails == dir-6a.html dir-6a.html
-fails == dir-7.html dir-7.html
-fails == dir-8.html dir-8.html
+== dir-7.html dir-7.html
+== dir-8.html dir-8.html
 == dir-9.html dir-9.html
 == dir-10.html dir-10.html
 == dir-11.html dir-11.html
 == css-spacing-1.html css-spacing-1.html
 fails pref(mathml.disabled,true) == disabled-scriptlevel-1.html disabled-scriptlevel-1.html # bug 1339711
 fails pref(mathml.disabled,true) == disabled-scriptlevel-1.xhtml disabled-scriptlevel-1.xhtml # bug 1339711
 fails == displaystyle-1.html displaystyle-1.html
-fails == displaystyle-2.html displaystyle-2.html
-fails == displaystyle-3.html displaystyle-3.html
+== displaystyle-2.html displaystyle-2.html
+== displaystyle-3.html displaystyle-3.html
 fails == displaystyle-4.html displaystyle-4.html
 == mirror-op-1.html mirror-op-1.html
 == mirror-op-2.html mirror-op-2.html
 == mirror-op-3.html mirror-op-3.html
 == mirror-op-4.html mirror-op-4.html
 == dynamic-mi.xhtml dynamic-mi.xhtml
 == mphantom-1.html mphantom-1.html
-fails == mphantom-2.html mphantom-2.html
+== mphantom-2.html mphantom-2.html
 == mfenced-1.xhtml mfenced-1.xhtml
 == mfenced-2a.xhtml mfenced-2a.xhtml
 == mfenced-2b.xhtml mfenced-2b.xhtml
 == mfenced-3a.xhtml mfenced-3a.xhtml
 == mfenced-3b.xhtml mfenced-3b.xhtml
 == mfenced-3c.xhtml mfenced-3c.xhtml
 == mfenced-3d.xhtml mfenced-3d.xhtml
 == mfenced-4a.xhtml mfenced-4a.xhtml
@@ -47,53 +47,53 @@ fails == mfenced-10.html mfenced-10.html
 == mfenced-12.html mfenced-12.html
 == mi-mathvariant-1.xhtml mi-mathvariant-1.xhtml
 == mi-mathvariant-2.xhtml mi-mathvariant-2.xhtml
 == mi-mathvariant-3.html mi-mathvariant-3.html
 == non-spacing-accent-1.xhtml non-spacing-accent-1.xhtml
 == overbar-width-1.xhtml overbar-width-1.xhtml
 == quotes-1.xhtml quotes-1.xhtml
 == stretchy-underbar-1.xhtml stretchy-underbar-1.xhtml
-fails == stretchy-munderover-1a.html stretchy-munderover-1a.html
-fails == stretchy-munderover-1b.html stretchy-munderover-1b.html
-fails == stretchy-munderover-1c.html stretchy-munderover-1c.html
-fails == stretchy-munderover-1d.html stretchy-munderover-1d.html
-fails == stretchy-munderover-1e.html stretchy-munderover-1e.html
-fails == stretchy-munderover-2a.html stretchy-munderover-2a.html
-fails == stretchy-munderover-2b.html stretchy-munderover-2b.html
-fails == stretchy-munderover-2c.html stretchy-munderover-2c.html
-fails == stretchy-munderover-2d.html stretchy-munderover-2d.html
-fails == stretchy-munderover-2e.html stretchy-munderover-2e.html
-fails == stretchy-munderover-2f.html stretchy-munderover-2f.html
-fails == stretchy-munderover-2g.html stretchy-munderover-2g.html
-fails == stretchy-munderover-3a.html stretchy-munderover-3a.html
-fails == stretchy-munderover-3b.html stretchy-munderover-3b.html
-fails == stretchy-munderover-3c.html stretchy-munderover-3c.html
-fails == stretchy-munderover-3d.html stretchy-munderover-3d.html
-fails == stretchy-msup-1a.html stretchy-msup-1a.html
-fails == stretchy-msup-1b.html stretchy-msup-1b.html
-fails == stretchy-msup-1c.html stretchy-msup-1c.html
-fails == stretchy-msup-1d.html stretchy-msup-1d.html
-fails == stretchy-mfenced-1a.html stretchy-mfenced-1a.html
-fails == stretchy-mfenced-1b.html stretchy-mfenced-1b.html
-fails == stretchy-mfenced-2a.html stretchy-mfenced-2a.html
-fails == stretchy-mfenced-2b.html stretchy-mfenced-2b.html
-fails == stretchy-mfenced-3a.html stretchy-mfenced-3a.html
-fails == stretchy-mfenced-3b.html stretchy-mfenced-3b.html
-fails == stretchy-mfenced-4a.html stretchy-mfenced-4a.html
-fails == stretchy-mfenced-4b.html stretchy-mfenced-4b.html
-fails == stretchy-mover-1a.html stretchy-mover-1a.html
-fails == stretchy-mover-1b.html stretchy-mover-1b.html
-fails == stretchy-mover-2a.html stretchy-mover-2a.html
-fails == stretchy-mover-2b.html stretchy-mover-2b.html
-fails == stretchy-mover-3.html stretchy-mover-3.html
+== stretchy-munderover-1a.html stretchy-munderover-1a.html
+== stretchy-munderover-1b.html stretchy-munderover-1b.html
+== stretchy-munderover-1c.html stretchy-munderover-1c.html
+== stretchy-munderover-1d.html stretchy-munderover-1d.html
+== stretchy-munderover-1e.html stretchy-munderover-1e.html
+== stretchy-munderover-2a.html stretchy-munderover-2a.html
+== stretchy-munderover-2b.html stretchy-munderover-2b.html
+== stretchy-munderover-2c.html stretchy-munderover-2c.html
+== stretchy-munderover-2d.html stretchy-munderover-2d.html
+== stretchy-munderover-2e.html stretchy-munderover-2e.html
+== stretchy-munderover-2f.html stretchy-munderover-2f.html
+== stretchy-munderover-2g.html stretchy-munderover-2g.html
+== stretchy-munderover-3a.html stretchy-munderover-3a.html
+== stretchy-munderover-3b.html stretchy-munderover-3b.html
+== stretchy-munderover-3c.html stretchy-munderover-3c.html
+== stretchy-munderover-3d.html stretchy-munderover-3d.html
+== stretchy-msup-1a.html stretchy-msup-1a.html
+== stretchy-msup-1b.html stretchy-msup-1b.html
+== stretchy-msup-1c.html stretchy-msup-1c.html
+== stretchy-msup-1d.html stretchy-msup-1d.html
+== stretchy-mfenced-1a.html stretchy-mfenced-1a.html
+== stretchy-mfenced-1b.html stretchy-mfenced-1b.html
+== stretchy-mfenced-2a.html stretchy-mfenced-2a.html
+== stretchy-mfenced-2b.html stretchy-mfenced-2b.html
+== stretchy-mfenced-3a.html stretchy-mfenced-3a.html
+== stretchy-mfenced-3b.html stretchy-mfenced-3b.html
+== stretchy-mfenced-4a.html stretchy-mfenced-4a.html
+== stretchy-mfenced-4b.html stretchy-mfenced-4b.html
+== stretchy-mover-1a.html stretchy-mover-1a.html
+== stretchy-mover-1b.html stretchy-mover-1b.html
+== stretchy-mover-2a.html stretchy-mover-2a.html
+== stretchy-mover-2b.html stretchy-mover-2b.html
+== stretchy-mover-3.html stretchy-mover-3.html
 == stretchy-largeop-1.html stretchy-largeop-1.html
 fails == stretchy-largeop-2.html stretchy-largeop-2.html
 == stretchy-largeop-3.html stretchy-largeop-3.html
-fails == table-width-1.xhtml table-width-1.xhtml
+== table-width-1.xhtml table-width-1.xhtml
 == table-width-2.html table-width-2.html
 fails == table-width-3.html table-width-3.html
 == table-width-4.html table-width-4.html
 == underbar-width-1.xhtml underbar-width-1.xhtml
 == mathml-type-supported.xhtml mathml-type-supported.xhtml
 fails == mtable-align-negative-rownumber.html mtable-align-negative-rownumber.html
 == embellished-op-1-1.html embellished-op-1-1.html
 == embellished-op-1-2.html embellished-op-1-2.html
@@ -121,19 +121,19 @@ fails-if(http.oscpu=="Linux\u0020x86_64"
 == mathcolor-1.xml mathcolor-1.xml
 == mathcolor-2.xml mathcolor-2.xml
 == mathcolor-3.xml mathcolor-3.xml
 == mathcolor-4.xml mathcolor-4.xml
 == mathbackground-1.xml mathbackground-1.xml
 == mathbackground-2.xml mathbackground-2.xml
 == mathbackground-3.xml mathbackground-3.xml
 == mathbackground-4.xml mathbackground-4.xml
-fails == mstyle-1.xhtml mstyle-1.xhtml
-fails == mstyle-2.xhtml mstyle-2.xhtml
-fails == mstyle-3.xhtml mstyle-3.xhtml
+== mstyle-1.xhtml mstyle-1.xhtml
+== mstyle-2.xhtml mstyle-2.xhtml
+== mstyle-3.xhtml mstyle-3.xhtml
 == mstyle-4.xhtml mstyle-4.xhtml
 == mstyle-5.xhtml mstyle-5.xhtml
 == scale-stretchy-1.xhtml scale-stretchy-1.xhtml
 == scale-stretchy-2.xhtml scale-stretchy-2.xhtml
 == scale-stretchy-3.xhtml scale-stretchy-3.xhtml
 == scale-stretchy-4.xhtml scale-stretchy-4.xhtml
 == scale-stretchy-5.xhtml scale-stretchy-5.xhtml
 fails == stretchy-1.html stretchy-1.html
@@ -143,30 +143,30 @@ fails == stretchy-1.html stretchy-1.html
 == mpadded-3.html mpadded-3.html
 == mpadded-4.html mpadded-4.html
 == mpadded-5.html mpadded-5.html
 == mpadded-1-2.html mpadded-1-2.html
 == mpadded-6.html mpadded-6.html
 random-if(gtkWidget) == mpadded-7.html mpadded-7.html
 random-if(gtkWidget) == mpadded-8.html mpadded-8.html
 random-if(gtkWidget) == mpadded-9.html mpadded-9.html
-fails == math-display.html math-display.html
+== math-display.html math-display.html
 fails == scriptlevel-1.html scriptlevel-1.html
-fails == scriptlevel-movablelimits-1.html scriptlevel-movablelimits-1.html
+== scriptlevel-movablelimits-1.html scriptlevel-movablelimits-1.html
 == munderover-align-accent-false.html munderover-align-accent-false.html
 == munderover-align-accent-true.html munderover-align-accent-true.html
 == munder-mover-align-accent-true.html munder-mover-align-accent-true.html
 == munder-mover-align-accent-false.html munder-mover-align-accent-false.html
-fails == mfrac-linethickness-1.xhtml mfrac-linethickness-1.xhtml
-fails == mfrac-linethickness-2.xhtml mfrac-linethickness-2.xhtml
-fails == mfrac-linethickness-3.xhtml mfrac-linethickness-3.xhtml
+== mfrac-linethickness-1.xhtml mfrac-linethickness-1.xhtml
+== mfrac-linethickness-2.xhtml mfrac-linethickness-2.xhtml
+== mfrac-linethickness-3.xhtml mfrac-linethickness-3.xhtml
 == mathml-negativespace.html mathml-negativespace.html
 == negative-mspace-1.html negative-mspace-1.html
 == link-1.xhtml link-1.xhtml
-fails == munderover-empty-scripts.html munderover-empty-scripts.html
+== munderover-empty-scripts.html munderover-empty-scripts.html
 == positive-namedspace.html positive-namedspace.html
 fails == mtable-align-whitespace.html mtable-align-whitespace.html
 == mtable-width.html mtable-width.html
 fails == mtable-rowlines-single-mtable-dynamic.html mtable-rowlines-single-mtable-dynamic.html
 fails == mtable-rowlines-multi-mtable-dynamic.html mtable-rowlines-multi-mtable-dynamic.html
 fails == mtable-rowalign-single-mtr.html mtable-rowalign-single-mtr.html
 fails == mtable-rowalign-single-mtr-dynamic.html mtable-rowalign-single-mtr-dynamic.html
 fails == mtable-rowalign-single-mtable.html mtable-rowalign-single-mtable.html
@@ -178,39 +178,39 @@ fails == mtable-columnlines-multi-mtable
 fails == mtable-columnalign-single-mtr.html mtable-columnalign-single-mtr.html
 fails == mtable-columnalign-single-mtr-dynamic.html mtable-columnalign-single-mtr-dynamic.html
 fails == mtable-columnalign-single-mtable.html mtable-columnalign-single-mtable.html
 fails == mtable-columnalign-single-mtable-dynamic.html mtable-columnalign-single-mtable-dynamic.html
 fails == mtable-columnalign-multi-mtr.html mtable-columnalign-multi-mtr.html
 fails == mtable-columnalign-multi-mtr-dynamic.html mtable-columnalign-multi-mtr-dynamic.html
 fails == mtable-columnalign-multi-mtable.html mtable-columnalign-multi-mtable.html
 fails == mtable-columnalign-multi-mtable-dynamic.html mtable-columnalign-multi-mtable-dynamic.html
-fails == maction-selection.html maction-selection.html
+== maction-selection.html maction-selection.html
 == maction-dynamic-embellished-op.html maction-dynamic-embellished-op.html
 == maction-dynamic-1.html maction-dynamic-1.html
 == maction-dynamic-2.html maction-dynamic-2.html
 == mo-lspace-rspace.html mo-lspace-rspace.html
 fails == mo-lspace-rspace-2.html mo-lspace-rspace-2.html
 == mo-lspace-rspace-3.html mo-lspace-rspace-3.html
-fails == mo-lspace-rspace-4.html mo-lspace-rspace-4.html
+== mo-lspace-rspace-4.html mo-lspace-rspace-4.html
 == mo-invisibleoperators.html mo-invisibleoperators.html
 == mo-invisibleoperators-2.html mo-invisibleoperators-2.html
-fails == mo-glyph-size.html mo-glyph-size.html
+== mo-glyph-size.html mo-glyph-size.html
 == maction-dynamic-3.html maction-dynamic-3.html
 == whitespace-trim-1.html whitespace-trim-1.html
 == whitespace-trim-2.html whitespace-trim-2.html
 == whitespace-trim-3.html whitespace-trim-3.html
 == whitespace-trim-4.html whitespace-trim-4.html
 == whitespace-trim-5.html whitespace-trim-5.html
 == opentype-stretchy.html opentype-stretchy.html
 == opentype-fraction-dynamic-linethickness.html opentype-fraction-dynamic-linethickness.html
 == operator-1.xhtml operator-1.xhtml
-fails == scriptshift-1.xhtml scriptshift-1.xhtml
+== scriptshift-1.xhtml scriptshift-1.xhtml
 == number-size-1.xhtml number-size-1.xhtml
-fails == multiscripts-1.html multiscripts-1.html
+== multiscripts-1.html multiscripts-1.html
 == mathml-mmultiscript-base.html mathml-mmultiscript-base.html
 == mathml-mmultiscript-mprescript.html mathml-mmultiscript-mprescript.html
 == menclose-1a.html menclose-1a.html
 == menclose-1b.html menclose-1b.html
 == menclose-1c.html menclose-1c.html
 == menclose-1d.html menclose-1d.html
 == menclose-1e.html menclose-1e.html
 == menclose-1f.html menclose-1f.html
@@ -297,20 +297,20 @@ fails == dtls-1.html dtls-1.html
 fails == dtls-2.html dtls-2.html
 fails == dtls-3.html dtls-3.html
 fails == ssty-1.html ssty-1.html
 fails == ssty-2.html ssty-2.html
 fails == ssty-3.html ssty-3.html
 fails == ssty-4.html ssty-4.html
 fails == mathscript-1.html mathscript-1.html
 fails == mathscript-2.html mathscript-2.html
-fails == mo-accent-dynamic.html mo-accent-dynamic.html
-fails == mo-movablelimits-dynamic.html mo-movablelimits-dynamic.html
-fails == munderover-accent-dynamic.html munderover-accent-dynamic.html
-fails == munderover-accentunder-dynamic.html munderover-accentunder-dynamic.html
+== mo-accent-dynamic.html mo-accent-dynamic.html
+== mo-movablelimits-dynamic.html mo-movablelimits-dynamic.html
+== munderover-accent-dynamic.html munderover-accent-dynamic.html
+== munderover-accentunder-dynamic.html munderover-accentunder-dynamic.html
 fails == columnlines-1a.html columnlines-1a.html
 fails == columnlines-1b.html columnlines-1b.html
 fails == columnlines-1c.html columnlines-1c.html
 == columnlines-2a.html columnlines-2a.html
 == columnlines-2b.html columnlines-2b.html
 == columnlines-3-1.html columnlines-3-1.html
 == columnlines-3-2.html columnlines-3-2.html
 fails == rowlines-1a.html rowlines-1a.html
@@ -328,51 +328,51 @@ fails == tablespacing-5.html tablespacin
 fails == tablespacing-5a.html tablespacing-5a.html
 fails == tablespacing-6.html tablespacing-6.html
 fails == tablespacing-7.html tablespacing-7.html
 == tablespacing-8a.html tablespacing-8a.html
 == tablespacing-8b.html tablespacing-8b.html
 == op-dict-1.html op-dict-1.html
 == op-dict-2.html op-dict-2.html
 == op-dict-3.html op-dict-3.html
-fails == op-dict-4.html op-dict-4.html
-fails == op-dict-5.html op-dict-5.html
+== op-dict-4.html op-dict-4.html
+== op-dict-5.html op-dict-5.html
 == op-dict-6.html op-dict-6.html
 == op-dict-7.html op-dict-7.html
 == op-dict-8.html op-dict-8.html
 == op-dict-9.html op-dict-9.html
-fails == op-dict-10.html op-dict-10.html
+== op-dict-10.html op-dict-10.html
 fails == op-dict-11.html op-dict-11.html
-fails == op-dict-12.html op-dict-12.html
-fails == op-dict-13.html op-dict-13.html
-fails == mfrac-A-1.html mfrac-A-1.html
+== op-dict-12.html op-dict-12.html
+== op-dict-13.html op-dict-13.html
+== mfrac-A-1.html mfrac-A-1.html
 == mfrac-A-2.html mfrac-A-2.html
 == mfrac-A-3.html mfrac-A-3.html
 == mfrac-A-4.html mfrac-A-4.html
-fails == mfrac-A-5.html mfrac-A-5.html
+== mfrac-A-5.html mfrac-A-5.html
 == mfrac-A-6.html mfrac-A-6.html
 == mfrac-A-7.html mfrac-A-7.html
 == mfrac-A-8.html mfrac-A-8.html
 == mfrac-B-1.html mfrac-B-1.html
-fails == mfrac-B-2.html mfrac-B-2.html
-fails == mfrac-B-3.html mfrac-B-3.html
+== mfrac-B-2.html mfrac-B-2.html
+== mfrac-B-3.html mfrac-B-3.html
 fails == mfrac-B-4.html mfrac-B-4.html
 fails == mfrac-B-5.html mfrac-B-5.html
 fails == mfrac-B-6.html mfrac-B-6.html
 fails == mfrac-B-7.html mfrac-B-7.html
-fails == mfrac-C-1.html mfrac-C-1.html
-fails == mfrac-C-2.html mfrac-C-2.html
+== mfrac-C-1.html mfrac-C-1.html
+== mfrac-C-2.html mfrac-C-2.html
 fails == mfrac-C-3.html mfrac-C-3.html
 fails == mfrac-C-4.html mfrac-C-4.html
-fails == mfrac-D-1.html mfrac-D-1.html
-fails == mfrac-D-2.html mfrac-D-2.html
+== mfrac-D-1.html mfrac-D-1.html
+== mfrac-D-2.html mfrac-D-2.html
 fails == mfrac-D-3.html mfrac-D-3.html
 fails == mfrac-D-4.html mfrac-D-4.html
-fails == mfrac-E-1.html mfrac-E-1.html
-fails pref(dom.webcomponents.enabled,true) == shadow-dom-1.html shadow-dom-1.html
+== mfrac-E-1.html mfrac-E-1.html
+pref(dom.webcomponents.enabled,true) == shadow-dom-1.html shadow-dom-1.html
 pref(font.size.inflation.emPerLine,25) == font-inflation-1.html font-inflation-1.html
 fails pref(font.minimum-size.x-math,40) == default-font.html default-font.html
 == radicalbar-1.html radicalbar-1.html
 == radicalbar-1a.html radicalbar-1a.html
 == radicalbar-1b.html radicalbar-1b.html
 == radicalbar-1c.html radicalbar-1c.html
 == radicalbar-1d.html radicalbar-1d.html
 == radicalbar-2.html radicalbar-2.html