diff --git a/mozilla/extensions/xforms/resources/content/xforms.css b/mozilla/extensions/xforms/resources/content/xforms.css
index 6538f39c45b..72ba0677cd1 100755
--- a/mozilla/extensions/xforms/resources/content/xforms.css
+++ b/mozilla/extensions/xforms/resources/content/xforms.css
@@ -233,6 +233,9 @@ html|*:root output[mozType|typelist~="http://www.w3.org/2001/XMLSchema#anyURI"][
 html|*:root output[mozType|typelist~="http://www.w3.org/2001/XMLSchema#base64Binary"][mozType|mediatype^="image"] {
   -moz-binding: url('chrome://xforms/content/xforms-xhtml.xml#xformswidget-output-mediatype-base64Binary');
 }
+html|*:root output[mozType|typelist~="http://www.w3.org/2001/XMLSchema#string"][mozType|mediatype="image/svg+xml"] {
+  -moz-binding: url('chrome://xforms/content/xforms-xhtml.xml#xformswidget-output-mediatype-texthtml');
+}
 
 xul|*:root output[mozType|typelist~="http://www.w3.org/2001/XMLSchema#anyURI"][mozType|mediatype^="image"] {
   -moz-binding: url('chrome://xforms/content/xforms-xhtml.xml#xformswidget-output-mediatype-anyURI');
@@ -240,6 +243,9 @@ xul|*:root output[mozType|typelist~="http://www.w3.org/2001/XMLSchema#anyURI"][m
 xul|*:root output[mozType|typelist~="http://www.w3.org/2001/XMLSchema#base64Binary"][mozType|mediatype^="image"] {
   -moz-binding: url('chrome://xforms/content/xforms-xhtml.xml#xformswidget-output-mediatype-base64Binary');
 }
+xul|*:root output[mozType|typelist~="http://www.w3.org/2001/XMLSchema#string"][mozType|mediatype="image/svg+xml"] {
+  -moz-binding: url('chrome://xforms/content/xforms-xhtml.xml#xformswidget-output-mediatype-texthtml');
+}
 
   /* output mediatype="text/html", mediatype="application/xhtml+xml" */
 html|*:root output[mozType|mediatype="text/html"],