diff --git a/content/html/content/src/nsHTMLAtoms.cpp b/content/html/content/src/nsHTMLAtoms.cpp
index e3b317977e2e..fb9a40a53f68 100644
--- a/content/html/content/src/nsHTMLAtoms.cpp
+++ b/content/html/content/src/nsHTMLAtoms.cpp
@@ -53,6 +53,7 @@ nsIAtom* nsHTMLAtoms::cols;
 nsIAtom* nsHTMLAtoms::colspan;
 nsIAtom* nsHTMLAtoms::columnPseudo;
 nsIAtom* nsHTMLAtoms::compact;
+nsIAtom* nsHTMLAtoms::content;
 nsIAtom* nsHTMLAtoms::coords;
 nsIAtom* nsHTMLAtoms::data;
 nsIAtom* nsHTMLAtoms::dir;
@@ -215,6 +216,7 @@ void nsHTMLAtoms::AddrefAtoms()
     colspan = NS_NewAtom("COLSPAN");
     columnPseudo = NS_NewAtom(":BODY-COLUMN");
     compact = NS_NewAtom("COMPACT");
+    content = NS_NewAtom("CONTENT");
     coords = NS_NewAtom("COORDS");
     dir = NS_NewAtom("DIR");
     div = NS_NewAtom("DIV");
@@ -374,6 +376,7 @@ void nsHTMLAtoms::ReleaseAtoms()
     NS_RELEASE(colspan);
     NS_RELEASE(columnPseudo);
     NS_RELEASE(compact);
+    NS_RELEASE(content);
     NS_RELEASE(coords);
     NS_RELEASE(dir);
     NS_RELEASE(disabled);
diff --git a/content/html/content/src/nsHTMLAtoms.h b/content/html/content/src/nsHTMLAtoms.h
index a7d1306e9cae..d03709e1cb69 100644
--- a/content/html/content/src/nsHTMLAtoms.h
+++ b/content/html/content/src/nsHTMLAtoms.h
@@ -76,6 +76,7 @@ public:
   static nsIAtom* colspan;
   static nsIAtom* columnPseudo;
   static nsIAtom* compact;
+  static nsIAtom* content;
   static nsIAtom* coords;
 
   static nsIAtom* data;
diff --git a/content/shared/public/nsHTMLAtoms.h b/content/shared/public/nsHTMLAtoms.h
index a7d1306e9cae..d03709e1cb69 100644
--- a/content/shared/public/nsHTMLAtoms.h
+++ b/content/shared/public/nsHTMLAtoms.h
@@ -76,6 +76,7 @@ public:
   static nsIAtom* colspan;
   static nsIAtom* columnPseudo;
   static nsIAtom* compact;
+  static nsIAtom* content;
   static nsIAtom* coords;
 
   static nsIAtom* data;
diff --git a/content/shared/src/nsHTMLAtoms.cpp b/content/shared/src/nsHTMLAtoms.cpp
index e3b317977e2e..fb9a40a53f68 100644
--- a/content/shared/src/nsHTMLAtoms.cpp
+++ b/content/shared/src/nsHTMLAtoms.cpp
@@ -53,6 +53,7 @@ nsIAtom* nsHTMLAtoms::cols;
 nsIAtom* nsHTMLAtoms::colspan;
 nsIAtom* nsHTMLAtoms::columnPseudo;
 nsIAtom* nsHTMLAtoms::compact;
+nsIAtom* nsHTMLAtoms::content;
 nsIAtom* nsHTMLAtoms::coords;
 nsIAtom* nsHTMLAtoms::data;
 nsIAtom* nsHTMLAtoms::dir;
@@ -215,6 +216,7 @@ void nsHTMLAtoms::AddrefAtoms()
     colspan = NS_NewAtom("COLSPAN");
     columnPseudo = NS_NewAtom(":BODY-COLUMN");
     compact = NS_NewAtom("COMPACT");
+    content = NS_NewAtom("CONTENT");
     coords = NS_NewAtom("COORDS");
     dir = NS_NewAtom("DIR");
     div = NS_NewAtom("DIV");
@@ -374,6 +376,7 @@ void nsHTMLAtoms::ReleaseAtoms()
     NS_RELEASE(colspan);
     NS_RELEASE(columnPseudo);
     NS_RELEASE(compact);
+    NS_RELEASE(content);
     NS_RELEASE(coords);
     NS_RELEASE(dir);
     NS_RELEASE(disabled);
diff --git a/layout/html/base/src/nsHTMLAtoms.cpp b/layout/html/base/src/nsHTMLAtoms.cpp
index e3b317977e2e..fb9a40a53f68 100644
--- a/layout/html/base/src/nsHTMLAtoms.cpp
+++ b/layout/html/base/src/nsHTMLAtoms.cpp
@@ -53,6 +53,7 @@ nsIAtom* nsHTMLAtoms::cols;
 nsIAtom* nsHTMLAtoms::colspan;
 nsIAtom* nsHTMLAtoms::columnPseudo;
 nsIAtom* nsHTMLAtoms::compact;
+nsIAtom* nsHTMLAtoms::content;
 nsIAtom* nsHTMLAtoms::coords;
 nsIAtom* nsHTMLAtoms::data;
 nsIAtom* nsHTMLAtoms::dir;
@@ -215,6 +216,7 @@ void nsHTMLAtoms::AddrefAtoms()
     colspan = NS_NewAtom("COLSPAN");
     columnPseudo = NS_NewAtom(":BODY-COLUMN");
     compact = NS_NewAtom("COMPACT");
+    content = NS_NewAtom("CONTENT");
     coords = NS_NewAtom("COORDS");
     dir = NS_NewAtom("DIR");
     div = NS_NewAtom("DIV");
@@ -374,6 +376,7 @@ void nsHTMLAtoms::ReleaseAtoms()
     NS_RELEASE(colspan);
     NS_RELEASE(columnPseudo);
     NS_RELEASE(compact);
+    NS_RELEASE(content);
     NS_RELEASE(coords);
     NS_RELEASE(dir);
     NS_RELEASE(disabled);
diff --git a/layout/html/base/src/nsHTMLAtoms.h b/layout/html/base/src/nsHTMLAtoms.h
index a7d1306e9cae..d03709e1cb69 100644
--- a/layout/html/base/src/nsHTMLAtoms.h
+++ b/layout/html/base/src/nsHTMLAtoms.h
@@ -76,6 +76,7 @@ public:
   static nsIAtom* colspan;
   static nsIAtom* columnPseudo;
   static nsIAtom* compact;
+  static nsIAtom* content;
   static nsIAtom* coords;
 
   static nsIAtom* data;