diff --git a/.mozilla/firefox/profile/chrome/userContent.css b/.mozilla/firefox/profile/chrome/userContent.css
index dc9eedd..340e081 100644
--- a/.mozilla/firefox/profile/chrome/userContent.css
+++ b/.mozilla/firefox/profile/chrome/userContent.css
@@ -4,4 +4,8 @@
   #root .Tab .close {
     transition: opacity 200ms ease-in;
   }
+
+  #root .PinnedTab .close {
+    display: none !important;
+  }
 }