diff --git a/layout/reftests/css-grid/grid-order-placement-auto-001-ref.html b/layout/reftests/css-grid/grid-order-placement-auto-001-ref.html
index 81c3274497a2..12f8749c8b2d 100644
--- a/layout/reftests/css-grid/grid-order-placement-auto-001-ref.html
+++ b/layout/reftests/css-grid/grid-order-placement-auto-001-ref.html
@@ -12,7 +12,6 @@
   height: 60px;
   border: 1px solid green;
   position: relative;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-order-placement-auto-001.html b/layout/reftests/css-grid/grid-order-placement-auto-001.html
index 2f7279729d42..8d03a6e6303b 100644
--- a/layout/reftests/css-grid/grid-order-placement-auto-001.html
+++ b/layout/reftests/css-grid/grid-order-placement-auto-001.html
@@ -19,7 +19,6 @@
   grid-auto-flow: row;
   grid-auto-columns: 20px;
   grid-auto-rows: 20px;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-order-placement-definite-001-ref.html b/layout/reftests/css-grid/grid-order-placement-definite-001-ref.html
index a2c9b9841c36..8fe35fffd2da 100644
--- a/layout/reftests/css-grid/grid-order-placement-definite-001-ref.html
+++ b/layout/reftests/css-grid/grid-order-placement-definite-001-ref.html
@@ -8,7 +8,7 @@
   <title>CSS Test: Testing definite placement of grid items with 'order'</title>
   <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1107786">
   <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
+body,html { color:black; background:white; font-size:16px; padding:0; margin:0; }
 
 .grid {
  /*display: grid;*/
diff --git a/layout/reftests/css-grid/grid-order-placement-definite-001.html b/layout/reftests/css-grid/grid-order-placement-definite-001.html
index 41625ea44eaf..5ff9749a64e0 100644
--- a/layout/reftests/css-grid/grid-order-placement-definite-001.html
+++ b/layout/reftests/css-grid/grid-order-placement-definite-001.html
@@ -11,7 +11,7 @@
   <link rel="help" href="http://dev.w3.org/csswg/css-flexbox-1/#order-property">
   <link rel="match" href="grid-order-placement-definite-001-ref.html">
   <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
+body,html { color:black; background:white; font-size:16px; padding:0; margin:0; }
 
 .grid {
  display: grid;
diff --git a/layout/reftests/css-grid/grid-placement-auto-col-dense-001-ref.html b/layout/reftests/css-grid/grid-placement-auto-col-dense-001-ref.html
index f57d5caf9873..a4b5c2fb92cc 100644
--- a/layout/reftests/css-grid/grid-placement-auto-col-dense-001-ref.html
+++ b/layout/reftests/css-grid/grid-placement-auto-col-dense-001-ref.html
@@ -7,7 +7,6 @@
   height: 60px;
   border: 1px solid green;
   position: relative;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-auto-col-dense-001.html b/layout/reftests/css-grid/grid-placement-auto-col-dense-001.html
index f6c19d8cd65c..16bac09879ba 100644
--- a/layout/reftests/css-grid/grid-placement-auto-col-dense-001.html
+++ b/layout/reftests/css-grid/grid-placement-auto-col-dense-001.html
@@ -11,7 +11,6 @@
   grid-auto-flow: dense column;
   grid-auto-columns: 20px;
   grid-auto-rows: 20px;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-auto-col-sparse-001-ref.html b/layout/reftests/css-grid/grid-placement-auto-col-sparse-001-ref.html
index 9d861b7716f0..273f65634431 100644
--- a/layout/reftests/css-grid/grid-placement-auto-col-sparse-001-ref.html
+++ b/layout/reftests/css-grid/grid-placement-auto-col-sparse-001-ref.html
@@ -7,7 +7,6 @@
   height: 60px;
   border: 1px solid green;
   position: relative;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-auto-col-sparse-001.html b/layout/reftests/css-grid/grid-placement-auto-col-sparse-001.html
index ab4892aa0487..12a9b1b7c1b5 100644
--- a/layout/reftests/css-grid/grid-placement-auto-col-sparse-001.html
+++ b/layout/reftests/css-grid/grid-placement-auto-col-sparse-001.html
@@ -11,7 +11,6 @@
   grid-auto-flow: column;
   grid-auto-columns: 20px;
   grid-auto-rows: 20px;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-auto-implicit-001-ref.html b/layout/reftests/css-grid/grid-placement-auto-implicit-001-ref.html
index 6b1c2db1c379..e6e26964759f 100644
--- a/layout/reftests/css-grid/grid-placement-auto-implicit-001-ref.html
+++ b/layout/reftests/css-grid/grid-placement-auto-implicit-001-ref.html
@@ -8,7 +8,7 @@
   <title>CSS Test: Testing placement of grid items outside the explicit grid</title>
   <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1146051">
   <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
+body,html { color:black; background:white; font-size:16px; padding:0; margin:0; }
 
 .grid {
  border: 1px solid blue;
diff --git a/layout/reftests/css-grid/grid-placement-auto-implicit-001.html b/layout/reftests/css-grid/grid-placement-auto-implicit-001.html
index 75622c2270fb..fd18c1557e77 100644
--- a/layout/reftests/css-grid/grid-placement-auto-implicit-001.html
+++ b/layout/reftests/css-grid/grid-placement-auto-implicit-001.html
@@ -11,7 +11,7 @@
   <link rel="help" href="http://dev.w3.org/csswg/css-grid/#overlarge-grids">
   <link rel="match" href="grid-placement-auto-implicit-001-ref.html">
   <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
+body,html { color:black; background:white; font-size:16px; padding:0; margin:0; }
 
 .grid {
  display: grid;
diff --git a/layout/reftests/css-grid/grid-placement-auto-row-dense-001-ref.html b/layout/reftests/css-grid/grid-placement-auto-row-dense-001-ref.html
index ec88a5e59a37..0c31d3d50d75 100644
--- a/layout/reftests/css-grid/grid-placement-auto-row-dense-001-ref.html
+++ b/layout/reftests/css-grid/grid-placement-auto-row-dense-001-ref.html
@@ -7,7 +7,6 @@
   height: 60px;
   border: 1px solid green;
   position: relative;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-auto-row-dense-001.html b/layout/reftests/css-grid/grid-placement-auto-row-dense-001.html
index 93df46ad05ee..9d6bc2308a5b 100644
--- a/layout/reftests/css-grid/grid-placement-auto-row-dense-001.html
+++ b/layout/reftests/css-grid/grid-placement-auto-row-dense-001.html
@@ -11,7 +11,6 @@
   grid-auto-flow: dense row;
   grid-auto-columns: 20px;
   grid-auto-rows: 20px;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-auto-row-sparse-001-ref.html b/layout/reftests/css-grid/grid-placement-auto-row-sparse-001-ref.html
index b71e4b7cb2c5..3a10e68b3ef7 100644
--- a/layout/reftests/css-grid/grid-placement-auto-row-sparse-001-ref.html
+++ b/layout/reftests/css-grid/grid-placement-auto-row-sparse-001-ref.html
@@ -7,7 +7,6 @@
   height: 60px;
   border: 1px solid green;
   position: relative;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-auto-row-sparse-001.html b/layout/reftests/css-grid/grid-placement-auto-row-sparse-001.html
index b3e276985a6b..dd4bb2ff534c 100644
--- a/layout/reftests/css-grid/grid-placement-auto-row-sparse-001.html
+++ b/layout/reftests/css-grid/grid-placement-auto-row-sparse-001.html
@@ -11,7 +11,6 @@
   grid-auto-flow: row;
   grid-auto-columns: 20px;
   grid-auto-rows: 20px;
-  font-size: 12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-definite-001-ref.html b/layout/reftests/css-grid/grid-placement-definite-001-ref.html
index 2391d214e385..bd4a6391677d 100644
--- a/layout/reftests/css-grid/grid-placement-definite-001-ref.html
+++ b/layout/reftests/css-grid/grid-placement-definite-001-ref.html
@@ -8,7 +8,6 @@
   height: 60px;
   border: 10px solid green;
   position: relative;
-  font-size:12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-definite-001.html b/layout/reftests/css-grid/grid-placement-definite-001.html
index 60050619ca43..235c5a89d89b 100644
--- a/layout/reftests/css-grid/grid-placement-definite-001.html
+++ b/layout/reftests/css-grid/grid-placement-definite-001.html
@@ -3,7 +3,7 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-
+	
 .grid {
  display: grid;
  grid-template-areas:
@@ -17,7 +17,6 @@
   grid-auto-flow: column dense;
   grid-auto-columns: 20px;
   grid-auto-rows: 20px;
-  font-size:12px;
 }
 
 span {
diff --git a/layout/reftests/css-grid/grid-placement-definite-002-ref.html b/layout/reftests/css-grid/grid-placement-definite-002-ref.html
index 9749c62bcf08..c724d0eebab1 100644
--- a/layout/reftests/css-grid/grid-placement-definite-002-ref.html
+++ b/layout/reftests/css-grid/grid-placement-definite-002-ref.html
@@ -4,7 +4,7 @@
     <title></title>
     <style type="text/css">
 html,body {
-  font-size:12px;
+  font-size:16px;
   font-family:monospace;
 }
 .grid {
diff --git a/layout/reftests/css-grid/grid-placement-definite-002.html b/layout/reftests/css-grid/grid-placement-definite-002.html
index 6e9cd72d1c2e..cd8b9915631d 100644
--- a/layout/reftests/css-grid/grid-placement-definite-002.html
+++ b/layout/reftests/css-grid/grid-placement-definite-002.html
@@ -4,7 +4,7 @@
     <title></title>
     <style type="text/css">
 html,body {
-  font-size:12px;
+  font-size:16px;
   font-family:monospace;
 }
 .grid {
diff --git a/layout/reftests/css-grid/grid-placement-definite-003-ref.html b/layout/reftests/css-grid/grid-placement-definite-003-ref.html
index e9d6f8c14246..49166a1735da 100644
--- a/layout/reftests/css-grid/grid-placement-definite-003-ref.html
+++ b/layout/reftests/css-grid/grid-placement-definite-003-ref.html
@@ -4,7 +4,7 @@
     <title></title>
     <style type="text/css">
 html,body {
-  font-size:12px;
+  font-size:16px;
   font-family:monospace;
 }
 .grid {
diff --git a/layout/reftests/css-grid/grid-placement-definite-003.html b/layout/reftests/css-grid/grid-placement-definite-003.html
index c23505f2ac2f..766bdc12acac 100644
--- a/layout/reftests/css-grid/grid-placement-definite-003.html
+++ b/layout/reftests/css-grid/grid-placement-definite-003.html
@@ -4,7 +4,7 @@
     <title></title>
     <style type="text/css">
 html,body {
-  font-size:12px;
+  font-size:16px;
   font-family:monospace;
 }
 .grid {
diff --git a/layout/reftests/css-grid/grid-placement-definite-implicit-001-ref.html b/layout/reftests/css-grid/grid-placement-definite-implicit-001-ref.html
index ad860c60289f..c84419ad10e4 100644
--- a/layout/reftests/css-grid/grid-placement-definite-implicit-001-ref.html
+++ b/layout/reftests/css-grid/grid-placement-definite-implicit-001-ref.html
@@ -8,7 +8,7 @@
   <title>CSS Test: Testing placement of grid items outside the explicit grid</title>
   <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1146051">
   <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
+body,html { color:black; background:white; font-size:16px; padding:0; margin:0; }
 
 .grid {
  border: 1px solid blue;
diff --git a/layout/reftests/css-grid/grid-placement-definite-implicit-001.html b/layout/reftests/css-grid/grid-placement-definite-implicit-001.html
index 63b273fc3980..da266cbac63d 100644
--- a/layout/reftests/css-grid/grid-placement-definite-implicit-001.html
+++ b/layout/reftests/css-grid/grid-placement-definite-implicit-001.html
@@ -11,7 +11,7 @@
   <link rel="help" href="http://dev.w3.org/csswg/css-grid/#overlarge-grids">
   <link rel="match" href="grid-placement-definite-implicit-001-ref.html">
   <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
+body,html { color:black; background:white; font-size:16px; padding:0; margin:0; }
 
 .grid {
  display: grid;
diff --git a/layout/reftests/css-grid/reftest.list b/layout/reftests/css-grid/reftest.list
index ce7fe560a030..fc902d8c9840 100644
--- a/layout/reftests/css-grid/reftest.list
+++ b/layout/reftests/css-grid/reftest.list
@@ -18,7 +18,7 @@ fails == grid-whitespace-handling-1b.xhtml grid-whitespace-handling-1-ref.xhtml
 == grid-order-placement-definite-001.html grid-order-placement-definite-001-ref.html
 skip-if(Android) == grid-placement-definite-implicit-001.html grid-placement-definite-implicit-001-ref.html
 == grid-placement-definite-implicit-002.html grid-placement-definite-implicit-002-ref.html
-skip-if(Android) fuzzy-if(winWidget,1,32) == grid-placement-auto-implicit-001.html grid-placement-auto-implicit-001-ref.html
+skip-if(Android) == grid-placement-auto-implicit-001.html grid-placement-auto-implicit-001-ref.html
 == grid-placement-abspos-implicit-001.html grid-placement-abspos-implicit-001-ref.html
 pref(layout.css.vertical-text.enabled,true) == rtl-grid-placement-definite-001.html rtl-grid-placement-definite-001-ref.html
 pref(layout.css.vertical-text.enabled,true) == rtl-grid-placement-auto-row-sparse-001.html rtl-grid-placement-auto-row-sparse-001-ref.html
diff --git a/layout/reftests/css-grid/rtl-grid-placement-auto-row-sparse-001-ref.html b/layout/reftests/css-grid/rtl-grid-placement-auto-row-sparse-001-ref.html
index 205e718f9502..adfdcddeb2cd 100644
--- a/layout/reftests/css-grid/rtl-grid-placement-auto-row-sparse-001-ref.html
+++ b/layout/reftests/css-grid/rtl-grid-placement-auto-row-sparse-001-ref.html
@@ -3,8 +3,6 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
-
 .grid {
   block-size: 60px;
   border: 2px solid green;
diff --git a/layout/reftests/css-grid/rtl-grid-placement-auto-row-sparse-001.html b/layout/reftests/css-grid/rtl-grid-placement-auto-row-sparse-001.html
index 3fee0d1f4b7e..a0f87ced7800 100644
--- a/layout/reftests/css-grid/rtl-grid-placement-auto-row-sparse-001.html
+++ b/layout/reftests/css-grid/rtl-grid-placement-auto-row-sparse-001.html
@@ -3,8 +3,6 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
-
 .grid {
   display: grid;
   border: 2px solid green;
diff --git a/layout/reftests/css-grid/rtl-grid-placement-definite-001-ref.html b/layout/reftests/css-grid/rtl-grid-placement-definite-001-ref.html
index 743b917efaf7..fd4d7433f869 100644
--- a/layout/reftests/css-grid/rtl-grid-placement-definite-001-ref.html
+++ b/layout/reftests/css-grid/rtl-grid-placement-definite-001-ref.html
@@ -4,7 +4,6 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
 
 .grid1, .grid2 {
   block-size: 60px;
diff --git a/layout/reftests/css-grid/rtl-grid-placement-definite-001.html b/layout/reftests/css-grid/rtl-grid-placement-definite-001.html
index 45519151283e..ec60bc3d775e 100644
--- a/layout/reftests/css-grid/rtl-grid-placement-definite-001.html
+++ b/layout/reftests/css-grid/rtl-grid-placement-definite-001.html
@@ -4,7 +4,6 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
 
 .grid1, .grid2 {
   display: grid;
diff --git a/layout/reftests/css-grid/vlr-grid-placement-auto-row-sparse-001-ref.html b/layout/reftests/css-grid/vlr-grid-placement-auto-row-sparse-001-ref.html
index bc90a09556d6..b311ac2a05b3 100644
--- a/layout/reftests/css-grid/vlr-grid-placement-auto-row-sparse-001-ref.html
+++ b/layout/reftests/css-grid/vlr-grid-placement-auto-row-sparse-001-ref.html
@@ -3,7 +3,6 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
 html {
   writing-mode: vertical-lr;
   text-orientation: sideways-right;
diff --git a/layout/reftests/css-grid/vlr-grid-placement-auto-row-sparse-001.html b/layout/reftests/css-grid/vlr-grid-placement-auto-row-sparse-001.html
index 872d35d07f12..eab163cd0523 100644
--- a/layout/reftests/css-grid/vlr-grid-placement-auto-row-sparse-001.html
+++ b/layout/reftests/css-grid/vlr-grid-placement-auto-row-sparse-001.html
@@ -3,7 +3,6 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
 html {
   writing-mode: vertical-lr;
   text-orientation: sideways-right;
diff --git a/layout/reftests/css-grid/vrl-grid-placement-auto-row-sparse-001-ref.html b/layout/reftests/css-grid/vrl-grid-placement-auto-row-sparse-001-ref.html
index 7d2fe1e9e70f..4c9844bc4df7 100644
--- a/layout/reftests/css-grid/vrl-grid-placement-auto-row-sparse-001-ref.html
+++ b/layout/reftests/css-grid/vrl-grid-placement-auto-row-sparse-001-ref.html
@@ -3,7 +3,6 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
 html {
   writing-mode: vertical-rl;
   text-orientation: sideways-right;
diff --git a/layout/reftests/css-grid/vrl-grid-placement-auto-row-sparse-001.html b/layout/reftests/css-grid/vrl-grid-placement-auto-row-sparse-001.html
index 51354b562e32..3553645bdc85 100644
--- a/layout/reftests/css-grid/vrl-grid-placement-auto-row-sparse-001.html
+++ b/layout/reftests/css-grid/vrl-grid-placement-auto-row-sparse-001.html
@@ -3,7 +3,6 @@
     <meta charset="utf-8">
     <title></title>
     <style type="text/css">
-body,html { color:black; background:white; font-size:12px; padding:0; margin:0; }
 html {
   writing-mode: vertical-rl;
   text-orientation: sideways-right;