Backed out changeset b2562e1376d2 (bug 1187615) for browser_menuButtonFitts.js failures.

browser/themes/linux/browser.css

@@ -613,6 +613,11 @@ toolbarbutton[constrain-size="true"][cui-areatype="toolbar"] > .toolbarbutton-ba
   width: 32px;
 }
 
+#nav-bar #PanelUI-menu-button {
+  -moz-padding-start: 5px;
+  -moz-padding-end: 5px;
+}
+
 .findbar-button:not(:-moz-any([checked="true"],[disabled="true"])):hover > .toolbarbutton-text,
 :-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1[open]:not([disabled=true]) > .toolbarbutton-menubutton-button > .toolbarbutton-icon,
 :-moz-any(#TabsToolbar, #nav-bar) .toolbarbutton-1:not([disabled=true]):not([open]):hover > .toolbarbutton-menubutton-button > .toolbarbutton-icon,

browser/themes/osx/browser.css

@@ -724,6 +724,8 @@ toolbar .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-ic
   margin-bottom: 0;
   padding-top: 1px;
   padding-bottom: 1px;
+  -moz-margin-start: 7px;
+  -moz-margin-end: 7px;
 }
 
 %include ../shared/toolbarbuttons.inc.css

browser/themes/shared/customizableui/panelUIOverlay.inc.css

@@ -92,8 +92,6 @@
 
 #PanelUI-button {
   margin-inline-start: 2px;
-  padding-inline-start: 2px;
-  padding-inline-end: 2px;
   border-inline-start: 1px solid;
   border-image: linear-gradient(transparent, rgba(0,0,0,.1) 20%, rgba(0,0,0,.1) 80%, transparent);
   border-image-slice: 1;

browser/themes/windows/browser.css

@@ -654,6 +654,11 @@ toolbar[brighttext] .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
   -moz-box-pack: center;
 }
 
+#nav-bar #PanelUI-menu-button {
+  -moz-padding-start: 5px;
+  -moz-padding-end: 5px;
+}
+
 #nav-bar .toolbarbutton-1[type=panel],
 #nav-bar .toolbarbutton-1[type=menu]:not(#back-button):not(#forward-button):not(#feed-button):not(#PanelUI-menu-button) {
   padding-left: 5px;