diff --git a/.mozilla/firefox/profile/chrome/userChrome.css b/.mozilla/firefox/profile/chrome/userChrome.css
index bb4f165..389ea82 100644
--- a/.mozilla/firefox/profile/chrome/userChrome.css
+++ b/.mozilla/firefox/profile/chrome/userChrome.css
@@ -1,3 +1,8 @@
 @import "color.css";
 @import "userChrome/sidebar.css";
 @import "userChrome/topbar.css";
+
+/* 去除弹出菜单的透明边框 (与compositor冲突) */
+.menupopup-arrowscrollbox, slot:nth-child(1) {
+  margin: 0 !important;
+}