--- a/browser/base/content/browser.css
+++ b/browser/base/content/browser.css
@@ -174,16 +174,17 @@ tabbrowser {
   pointer-events: none; /* avoid blocking dragover events on scroll buttons */
 }
 
 .tabbrowser-tab[tabdrop-samewindow],
 .tabbrowser-tabs[movingtab] > .tabbrowser-tab[fadein]:not([selected]) {
   transition: transform 200ms var(--animation-easing-function);
 }
 
+#TabsToolbar[movingtab] > .chromeclass-toolbar-additional,
 #TabsToolbar[movingtab] > .tabbrowser-tabs {
   padding-bottom: 15px;
 }
 
 #TabsToolbar[movingtab] + #nav-bar {
   margin-top: -15px;
   pointer-events: none;
 }