--- a/devtools/client/themes/memory.css
+++ b/devtools/client/themes/memory.css
@@ -99,20 +99,16 @@ html, body, #app, #memory-tool {
 /**
  * Due to toolbar styles of `.devtools-toolbarbutton:not([label])` which overrides
  * .devtools-toolbarbutton's min-width of 78px, reset the min-width.
  */
 #import-snapshot {
   min-width: 78px;
 }
 
-#diff-snapshots[disabled] {
-  opacity: .5;
-}
-
 .spacer {
   flex: 1;
 }
 
 #filter {
   align-self: stretch;
   margin: 2px;
 }