diff --git a/browser/base/content/browser.xul b/browser/base/content/browser.xul
index 44b710dd350..a2b8d624977 100644
--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -1182,8 +1182,8 @@
     <svg:clipPath id="tab-curve-clip-path-end" clipPathUnits="objectBoundingBox">
       <svg:path d="M -0.0333,0.0645 C 0.4317,0.0679,0.4831,0.3764,0.5163,0.5484 c 0.0522,0.2702,+0.1425,0.4194,0.4333,0.4194 L 1,1 H -0.033 V 0.0645 z"/>
     </svg:clipPath>
-    <svg:clipPath id="tab-clip-path-outer" clipPathUnits="userSpaceOnUse">
-      <svg:path d="M 30,0 C 24,0 17.78,2.58 15.10,8.09 12.05,13.46 13.14,20.37 9.18,25.3 7.1,27.7 3.8,28 0.8,28 c -0.4,0.6 -2.09,1.11 -1.46,1.80 l 2.45,2.72 61.60,0 2.59,-3.06 C 65.15,28.96 64.57,27.80 63.5,28 60.13,28.13 56.33,27.03 54.74,23.78 51.85,18.44 52.65,11.81 49.09,6.73 45.88,1.65 39.54,-0.26 33.8,0 32.5,0 31.7,0 30,0 z"/>
+    <svg:clipPath id="tab-clip-path-outer" clipPathUnits="objectBoundingBox">
+      <svg:path d="m 0.2197,0 0,0.4264 c -0.0156,0.1238 -0.0201,0.2548 -0.0492,0.3730 C 0.1464,0.9030 0.0889,0.9397 0.0379,0.9355 L 0,1 1,1 0.9621,0.9355 c -0.0511,0.0042 -0.1085,-0.0322 -0.1326,-0.1361 -0.0292,-0.1152 -0.0334,-0.2486 -0.0492,-0.3730 L 0.7803,0 z"/>
     </svg:clipPath>
 
 #ifndef XP_UNIX