diff --git a/firefox/userChrome.css b/firefox/userChrome.css
index 8bafd61..6f53e06 100644
--- a/firefox/userChrome.css
+++ b/firefox/userChrome.css
@@ -12,3 +12,7 @@
 #star-button-box {
   display: none;
 }
+
+* {
+  border-radius: 0 !important;
+}