diff --git a/firefox/userChrome.css b/firefox/userChrome.css
index 10bc6c7..8bafd61 100644
--- a/firefox/userChrome.css
+++ b/firefox/userChrome.css
@@ -7,4 +7,8 @@
 }
 #sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] #sidebar-header {
   display: none;
-}
\ No newline at end of file
+}
+
+#star-button-box {
+  display: none;
+}