diff --git a/layout/html/document/src/ua.css b/layout/html/document/src/ua.css
index 2dd0f5e30273..28e5a77bb217 100644
--- a/layout/html/document/src/ua.css
+++ b/layout/html/document/src/ua.css
@@ -299,15 +299,9 @@ DD {
 
 // Leafs
 
-APPLET {
-  display: inline;
-}
 EMBED {
   display: inline;
 }
-OBJECT {
-  display: inline;
-}
 HR {
   display: block;
   margin-top: 0;
@@ -345,3 +339,24 @@ OPTION {
 TEXTAREA {
   vertical-align: bottom;
 }
+
+// Misc
+
+APPLET {
+  display: inline;
+}
+AREA {
+  display: none;
+}
+HEAD {
+  display: none;
+}
+MAP {
+  display: none;
+}
+META {
+  display: none;
+}
+OBJECT {
+  display: inline;
+}
diff --git a/layout/style/ua.css b/layout/style/ua.css
index 2dd0f5e30273..28e5a77bb217 100644
--- a/layout/style/ua.css
+++ b/layout/style/ua.css
@@ -299,15 +299,9 @@ DD {
 
 // Leafs
 
-APPLET {
-  display: inline;
-}
 EMBED {
   display: inline;
 }
-OBJECT {
-  display: inline;
-}
 HR {
   display: block;
   margin-top: 0;
@@ -345,3 +339,24 @@ OPTION {
 TEXTAREA {
   vertical-align: bottom;
 }
+
+// Misc
+
+APPLET {
+  display: inline;
+}
+AREA {
+  display: none;
+}
+HEAD {
+  display: none;
+}
+MAP {
+  display: none;
+}
+META {
+  display: none;
+}
+OBJECT {
+  display: inline;
+}