Sometimes I need to inspect elements that are only showing up on a page if you put mouse over some area. The problem is that if you start moving mouse towards firebug consol
I found that Chrome does work a bit differently than Firefox. In particular, menus that close when the mouse is clicked outside of the menu remain open when inspecting them in Chrome (and they close when inspecting them with Firebug). So the advice is to try to use a different development tool in a different browser to see if it makes a difference.