diff --git a/.mozilla/firefox/profile/chrome/userContent.css b/.mozilla/firefox/profile/chrome/userContent.css
index 5a8c5be..bfe104b 100644
--- a/.mozilla/firefox/profile/chrome/userContent.css
+++ b/.mozilla/firefox/profile/chrome/userContent.css
@@ -66,6 +66,7 @@
     display: none !important;
   }
   #tabbox #tabList .tab[url^="moz-extension:"] .line2,
+  #tabbox #tabList .tab[url^="file:///"] .line2,
   #tabbox #tabList .tab[url^="https://addons.mozilla.org/"] .line2,
   #tabbox #tabList .tab[url^="about:"] .line2 {
     background-color: #ee9090;
@@ -74,6 +75,10 @@
   #tabbox #tabList .tab:not(:hover) button.close {
     display: none !important;
   }
+  /* 自动隐藏音量图标 */
+  body:not(:hover) div.audio {
+    display: none !important;
+  }
 
   /* 隐藏新标签按钮 */
   #newTab {