diff --git a/chrome/curved_tabs.css b/chrome/curved_tabs.css
index fe79104..a0ba24f 100644
--- a/chrome/curved_tabs.css
+++ b/chrome/curved_tabs.css
@@ -56,6 +56,8 @@ See the above repository for updates as well as full license text. */
   transform: scaleX(-1);
 }
 
+.tab-background{ -moz-box-direction: reverse }
+
 .tabbrowser-tab:hover > stack > .tab-background,
 .tab-background[selected]{
   border-radius: var(--uc-tab-curve-size) var(--uc-tab-curve-size) 0 0 !important;