Apparently some browsers (e.g. IE) perform a clicking sound on each URL update and this begavior wasn’t really pleasant when map URL was constantly updated when map was dragged. I tweaked a code a little so it updates URL only when dragging is over (link on the right updates in real time) so now you should here reasonable amount of clicking if you use those clicking browsers.
As a side effect URL stays the same when you originally load the page as http://www.sergeychernyshev.com/maps.html