diff --git a/browser/themes/linux/browser.css b/browser/themes/linux/browser.css
index 2f28c5a46e8..58d39080058 100644
--- a/browser/themes/linux/browser.css
+++ b/browser/themes/linux/browser.css
@@ -486,10 +486,7 @@ menuitem:not([type]):not(.menuitem-tooltip):not(.menuitem-iconic-tooltip) {
 
 /* Primary toolbar buttons */
 .toolbarbutton-1:not([type="menu-button"]) {
-  -moz-box-orient: vertical;
   min-width: 0;
-  list-style-image: url("chrome://browser/skin/Toolbar.png");
-  -moz-image-region: rect(0, 18px, 18px, 0);
 }
 
 .toolbarbutton-1 > .toolbarbutton-icon {