diff --git a/src/vs/languages/css/common/buildscripts/css-schema.xml b/src/vs/languages/css/common/buildscripts/css-schema.xml
index 8641286e3b4..05111edd240 100644
--- a/src/vs/languages/css/common/buildscripts/css-schema.xml
+++ b/src/vs/languages/css/common/buildscripts/css-schema.xml
@@ -5150,7 +5150,7 @@
         </value>
       </values>
     </entry>
-    <entry name="font-variant-ligatures" restriction="enum" version="3.0" browsers="34" ref="http://www.w3.org/TR/css3-fonts/#font-variant-ligatures-prop" syntax="div { $(name): historical-ligatures; }">
+    <entry name="font-variant-ligatures" restriction="enum" version="3.0" browsers="C18,FF34,O15,S6" ref="http://www.w3.org/TR/css3-fonts/#font-variant-ligatures-prop" syntax="div { $(name): historical-ligatures; }">
       <desc>Specifies control over which ligatures are enabled or disabled. A value of ‘normal’ implies that the defaults set by the font are used.</desc>
       <values>
         <value name="additional-ligatures" version="3.0" browsers="all">
@@ -5159,7 +5159,7 @@
         <value name="common-ligatures" version="3.0" browsers="all">
           <desc>Enables display of common ligatures.</desc>
         </value>
-        <value name="contextual" version="3.0" browsers="all">
+        <value name="contextual" version="3.0" browsers="C35,F34,O22">
           <desc>Enables display of contextual alternates.</desc>
         </value>
         <value name="discretionary-ligatures" version="3.0" browsers="all">
@@ -5174,7 +5174,7 @@
         <value name="no-common-ligatures" version="3.0" browsers="all">
           <desc>Disables display of common ligatures.</desc>
         </value>
-        <value name="no-contextual" version="3.0" browsers="all">
+        <value name="no-contextual" version="3.0" browsers="C35,F34,O22">
           <desc>Disables display of contextual alternates.</desc>
         </value>
         <value name="no-discretionary-ligatures" version="3.0" browsers="all">
@@ -5183,7 +5183,7 @@
         <value name="no-historical-ligatures" version="3.0" browsers="all">
           <desc>Disables display of historical ligatures.</desc>
         </value>
-        <value name="none" version="3.0" browsers="all">
+        <value name="none" version="3.0" browsers="FF34">
           <desc>Disables all ligatures.</desc>
         </value>
         <value name="normal" version="3.0" browsers="all">
@@ -5221,7 +5221,7 @@
         </value>
       </values>
     </entry>
-    <entry name="font-variant-position" restriction="enum" version="3.0" browsers="34" ref="http://www.w3.org/TR/css3-fonts/#propdef-font-variant-position" syntax="sub { $(name): subscript; }">
+    <entry name="font-variant-position" restriction="enum" version="3.0" browsers="FF34" ref="http://www.w3.org/TR/css3-fonts/#propdef-font-variant-position" syntax="sub { $(name): subscript; }">
       <desc>Specifies the vertical position</desc>
       <values>
         <value name="normal" version="3.0" browsers="all" />