diff --git a/userChrome.css b/userChrome.css
index 3d81f94..36bec17 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -7,7 +7,8 @@
   /** Root - Reduce Padding ***************************************************/
   :root {
     /* Tab Bar */
-    --proton-tab-block-margin: 2px !important; /* Original: 4px */
+    --proton-tab-block-margin: 0px !important; /* Original: 4px */
+    --tab-border-radius:       0px !important; /* Original: 4px */
     --inline-tab-padding:      6px !important; /* Original: 8px */
 
     /* Panel */