(using Mozilla Firefox 23.0.1 on a Dell laptop with Windows 7 OS) Tried to use the zoom feature (Alt plus mouse wheel) to zoom the map. Sometimes it appears to work, but then the map jumps down as if you where just using the scroll wheel to scroll down the page. Tried to do the same with the touch pad (Alt plus touch pad scroll sidebar) and can't get it to zoom at all although it occasionally refreshes as if it tried to do something. (the sidebar does work to scroll the page) Any chance that the laptop touch pad/tablet two finger pinch zoom could be implemented?