--- a/mobile/chrome/content/browser.js
+++ b/mobile/chrome/content/browser.js
@@ -1084,18 +1084,23 @@ var Browser = {
           this.zoomToPoint(json.x, json.y, rect);
         } else {
           this.zoomFromPoint(json.x, json.y);
         }
         break;
 
       case "scroll":
         if (browser == this.selectedBrowser) {
-          this.hideTitlebar();
-          this.hideSidebars();
+          let view = browser.getRootView();
+          let position = view.getPosition();
+          if (position.x != 0)
+            this.hideSidebars();
+
+          if (position.y != 0)
+            this.hideTitlebar();
         }
         break;
       case "Browser:CertException":
         this._handleCertException(aMessage);
         break;
     }
   }
 };