--- a/mobile/android/themes/core/aboutMemory.css
+++ b/mobile/android/themes/core/aboutMemory.css
@@ -75,44 +75,25 @@ h2 {
   /*
    * Technically this should be used with the default background colour,
    * instead we're using the default field background colour,
    * I hope this will be okay.
    */
   color: -moz-activehyperlinktext;
 }
 
-.accuracyWarning {
-}
-
-.badInputWarning {
-}
-
 .treeline {
   color: -moz-FieldText;
   opacity: 0.5;
 }
 
-/*
- * We might like to style these but cannot find a colour that always
- * contrasts with the background colour.
- */
-.mrValue, .mrName, .mrNote {
-}
-
 .mrValue {
   font-weight: bold;
 }
 
-.mrPerc {
-}
-
-.mrSep {
-}
-
 .hasKids {
   cursor: pointer;
 }
 
 .hasKids:hover {
   text-decoration: underline;
 }
 
@@ -144,9 +125,8 @@ h2 {
 button {
   margin: 1%;
   padding: 2%;
 }
 
 .hiddenOnMobile {
   display: none;
 }
-

--- a/toolkit/components/aboutmemory/content/aboutMemory.css
+++ b/toolkit/components/aboutmemory/content/aboutMemory.css
@@ -86,44 +86,25 @@ a.upDownArrow {
   /*
    * Technically this should be used with the default background colour,
    * instead we're using the default field background colour,
    * I hope this will be okay.
    */
   color: -moz-activehyperlinktext;
 }
 
-.accuracyWarning {
-}
-
-.badInputWarning {
-}
-
 .treeline {
   color: -moz-FieldText;
   opacity: 0.5;
 }
 
-/*
- * We might like to style these but cannot find a colour that always
- * contrasts with the background colour.
- */
-.mrValue, .mrName, .mrNote {
-}
-
 .mrValue {
   font-weight: bold;
 }
 
-.mrPerc {
-}
-
-.mrSep {
-}
-
 .hasKids {
   cursor: pointer;
 }
 
 .hasKids:hover {
   text-decoration: underline;
 }
 
@@ -149,9 +130,8 @@ a.upDownArrow {
   display: none;
 }
 
 /* Desktop-specific parts go here. */
 
 .hasKids:hover {
   text-decoration: underline;
 }
-