do not set overscroll-behavior to none for x axis as it breaks going back/forward from touchpad on some browsers (#79)

assets/css/template-styles.css

@@ -22,7 +22,7 @@ body {
     line-height: 1.5;
     color: #111;
     background-color: #fefefe;
-    overscroll-behavior: none;
+    overscroll-behavior-y: none;
 }
 template {
   display: none !important;