--- a/browser/themes/shared/tabs.inc.css
+++ b/browser/themes/shared/tabs.inc.css
@@ -232,18 +232,18 @@
 }
 
 .tab-icon-sound[soundplaying]:not(:hover),
 .tab-icon-sound[muted]:not(:hover),
 .tab-icon-sound[blocked]:not(:hover) {
   opacity: .8;
 }
 
-.tab-icon-sound[soundplaying-scheduledremoval]:not(:hover),
-.tab-icon-overlay[soundplaying-scheduledremoval]:not(:hover) {
+.tab-icon-sound[soundplaying-scheduledremoval]:not([muted]):not(:hover),
+.tab-icon-overlay[soundplaying-scheduledremoval]:not([muted]):not(:hover) {
   transition: opacity .3s linear var(--soundplaying-removal-delay);
   opacity: 0;
 }
 
 .tab-background,
 .tabs-newtab-button {
   /* overlap the tab curves */
   margin-inline-end: calc(-1 * var(--tab-curve-half-width));