diff --git a/userChrome.css b/userChrome.css
index 195d963..95d0623 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -79,6 +79,7 @@
 
     :root[tabsintitlebar]:not(:-moz-window-inactive, :-moz-lwtheme) .toolbar-items,
     :root[tabsintitlebar][lwt-default-theme-in-dark-mode]:not(:-moz-window-inactive) .toolbar-items {
+      --toolbarbutton-icon-fill: currentColor;
       --toolbarbutton-hover-background: color-mix(in srgb, -moz-accent-color-foreground 10%, transparent);
       --toolbarbutton-active-background: color-mix(in srgb, -moz-accent-color-foreground 15%, transparent);
     }