diff --git a/chrome/tab_separator_lines.css b/chrome/tab_separator_lines.css
index 532f35c..4f61e09 100644
--- a/chrome/tab_separator_lines.css
+++ b/chrome/tab_separator_lines.css
@@ -16,5 +16,7 @@ See the above repository for updates as well as full license text. */
 .tabbrowser-tab:hover,
 .tabbrowser-tab[beforehovered],
 .tabbrowser-tab[selected],
+.tabbrowser-tab[multiselected],
 .tabbrowser-tab[last-visible-tab],
+.tabbrowser-tab[before-multiselected],
 .tabbrowser-tab[beforeselected-visible]{ border-image: none !important; }
\ No newline at end of file