diff --git a/mozilla/content/html/document/src/nsHTMLContentSink.cpp b/mozilla/content/html/document/src/nsHTMLContentSink.cpp
index f58e1557a2d..4d96889a6f5 100644
--- a/mozilla/content/html/document/src/nsHTMLContentSink.cpp
+++ b/mozilla/content/html/document/src/nsHTMLContentSink.cpp
@@ -720,12 +720,6 @@ MakeContentObject(nsHTMLTag aNodeType,
     rv = NS_NewHTMLLabelElement(aResult, aAtom);
     SetForm(*aResult, aForm);
     break;
-  case eHTMLTag_layer:
-    rv = NS_NewHTMLLayerElement(aResult, aAtom);
-    break;
-  case eHTMLTag_ilayer:
-    rv = NS_NewHTMLLayerElement(aResult, aAtom);
-    break;
   case eHTMLTag_legend:
     rv = NS_NewHTMLLegendElement(aResult, aAtom);
     break;
@@ -1213,7 +1207,6 @@ SinkContext::OpenContainer(const nsIParserNode& aNode)
       mSink->ProcessATag(aNode, content);
       break;
     case eHTMLTag_table:
-    case eHTMLTag_layer:
     case eHTMLTag_thead:
     case eHTMLTag_tbody:
     case eHTMLTag_tfoot:
diff --git a/mozilla/layout/html/document/src/html.css b/mozilla/layout/html/document/src/html.css
index 9cccf09aaa8..4668940476a 100644
--- a/mozilla/layout/html/document/src/html.css
+++ b/mozilla/layout/html/document/src/html.css
@@ -114,10 +114,6 @@ h6 {
   font-weight: bold;
   margin: 2.33em 0;
 }
-layer {
-  display: block;
-  position: absolute;
-}
 listing {
   display: block;
   font-family: -moz-fixed;
@@ -280,10 +276,6 @@ sub {
 sup {
   vertical-align: super;
 }
-ilayer {
-  position: relative;
-  display: inline;
-}
 nobr {
   display: inline;
   white-space: nowrap;
diff --git a/mozilla/layout/html/document/src/nsHTMLContentSink.cpp b/mozilla/layout/html/document/src/nsHTMLContentSink.cpp
index f58e1557a2d..4d96889a6f5 100644
--- a/mozilla/layout/html/document/src/nsHTMLContentSink.cpp
+++ b/mozilla/layout/html/document/src/nsHTMLContentSink.cpp
@@ -720,12 +720,6 @@ MakeContentObject(nsHTMLTag aNodeType,
     rv = NS_NewHTMLLabelElement(aResult, aAtom);
     SetForm(*aResult, aForm);
     break;
-  case eHTMLTag_layer:
-    rv = NS_NewHTMLLayerElement(aResult, aAtom);
-    break;
-  case eHTMLTag_ilayer:
-    rv = NS_NewHTMLLayerElement(aResult, aAtom);
-    break;
   case eHTMLTag_legend:
     rv = NS_NewHTMLLegendElement(aResult, aAtom);
     break;
@@ -1213,7 +1207,6 @@ SinkContext::OpenContainer(const nsIParserNode& aNode)
       mSink->ProcessATag(aNode, content);
       break;
     case eHTMLTag_table:
-    case eHTMLTag_layer:
     case eHTMLTag_thead:
     case eHTMLTag_tbody:
     case eHTMLTag_tfoot:
diff --git a/mozilla/layout/style/html.css b/mozilla/layout/style/html.css
index 9cccf09aaa8..4668940476a 100644
--- a/mozilla/layout/style/html.css
+++ b/mozilla/layout/style/html.css
@@ -114,10 +114,6 @@ h6 {
   font-weight: bold;
   margin: 2.33em 0;
 }
-layer {
-  display: block;
-  position: absolute;
-}
 listing {
   display: block;
   font-family: -moz-fixed;
@@ -280,10 +276,6 @@ sub {
 sup {
   vertical-align: super;
 }
-ilayer {
-  position: relative;
-  display: inline;
-}
 nobr {
   display: inline;
   white-space: nowrap;