--- a/browser/themes/linux/browser.css
+++ b/browser/themes/linux/browser.css
@@ -683,18 +683,16 @@ notification[value="translation"] menuli
   /* The button box must appear on top of the navigator-toolbox in order for
    * click and hover mouse events to work properly for the button in the restored
    * window state. Otherwise, elements in the navigator-toolbox, like the menubar,
    * can swallow those events.
    */
   #titlebar-buttonbox {
     z-index: 1;
     -moz-box-align: center;
-    padding-top: 2px;
-    padding-bottom: 2px;
   }
 
   /* Render titlebar command buttons according to system config.
    * Use full scale icons here as the Gtk+ does.
    */
   @media (-moz-gtk-csd-minimize-button) {
     #titlebar-min {
       -moz-appearance: -moz-window-button-minimize;