diff --git a/modules/ext.math.css b/modules/ext.math.css
index 7098b2d..3ce4731 100644
--- a/modules/ext.math.css
+++ b/modules/ext.math.css
@@ -6,16 +6,20 @@
        Shows browser-dependent math output.
 */
 
-.mwe-math-mathml-inline { display: none;}
-.mwe-math-mathml-display { display: none ;}
+.mwe-math-mathml-inline,
+.mwe-math-mathml-display { display: none; }
 .mwe-math-fallback-png-inline { display: inline; vertical-align: middle}
 .mwe-math-fallback-png-display { display: block;  margin-left: auto;  margin-right: auto;}
 .mwe-math-fallback-source-inline { display: inline; vertical-align: middle}
 .mwe-math-fallback-source-display { display: block;  margin-left: auto;  margin-right: auto;}
 
 @-moz-document url-prefix() {
-    .mwe-math-mathml-inline { display: inline !important; }
-    .mwe-math-mathml-display { display: block !important;  margin:auto!important;}
+    span.mwe-math-mathml-inline { display: inline !important; }
+    span.mwe-math-mathml-display { display: block !important; margin: auto !important; }
+    span.mwe-math-mathml-inline + img.mwe-math-fallback-svg-inline,
+    span.mwe-math-mathml-display + img.mwe-math-fallback-svg-display,
+    img.mwe-math-fallback-svg-inline + img.mwe-math-fallback-png-inline,
+    img.mwe-math-fallback-svg-display + img.mwe-math-fallback-png-display { display: none !important; }
 }
 
 /* Set the fonts to use for the MathML rendering */