diff --git a/devtools/client/themes/toolbox.css b/devtools/client/themes/toolbox.css
index 37b2020798af..59e933ec529d 100644
--- a/devtools/client/themes/toolbox.css
+++ b/devtools/client/themes/toolbox.css
@@ -301,3 +301,14 @@
 #toolbox-container.tabs-reordering > .theme-body {
   pointer-events: none;
 }
+
+#toolbox-container.tabs-reordering .devtools-tab:not(.selected):hover .devtools-tab-line {
+  background: transparent;
+  opacity: 0;
+  transition: none;
+}
+
+#toolbox-container.tabs-reordering .devtools-tab.selected {
+  background-color: var(--theme-toolbar-hover);
+  z-index: 1;
+}