diff --git a/chrome/multi-row_tabs.css b/chrome/multi-row_tabs.css
index 6427b40..aec82bd 100644
--- a/chrome/multi-row_tabs.css
+++ b/chrome/multi-row_tabs.css
@@ -83,4 +83,9 @@ See the above repository for updates as well as full license text. */
 @media (-moz-bool-pref: "userchrome.multirowtabs.scrollbar-handle.enabled"),
        -moz-pref( "userchrome.multirowtabs.scrollbar-handle.enabled"){
   #tabbrowser-arrowscrollbox{ -moz-window-dragging: no-drag }
-}
\ No newline at end of file
+}
+
+/* Make tab groups collapse */
+tab-group[collapsed] .tabbrowser-tab[fadein]:not([pinned]){
+  min-width: 0 !important;
+}