Bug 1133246 - Fix wrong buttons alignment with content on about pages using info-pages.css. r=jaws

toolkit/themes/shared/in-content/info-pages.inc.css

@@ -77,6 +77,10 @@ ul {
   min-width: 150px;
 }
 
+.button-container > button:first-child {
+  -moz-margin-start: 0;
+}
+
 /* Trees */
 tree {
   min-height: 12em;