diff --git a/home/firefox/custom.css b/home/firefox/custom.css
index 25c42b4..cddd708 100644
--- a/home/firefox/custom.css
+++ b/home/firefox/custom.css
@@ -8,6 +8,7 @@
   --margin-left-icons-personal: 3px !important;
   --tab-height-personal: 40px !important;
   --uc-tab-corner-height: 40px !important;
+  --uc-vertical-toolbar-width: 46px !important;
 }
 
 /* https://github.com/Godiesc/firefox-gx/blob/main/Tricks/README.md */