Tab cloning in Firefox

Now with Firefox 3.x versions, one can clone the tab. No more copying the URL and pasting them in a new tab. One can just 'center' click on the Refresh button of the Web-browser and it will clone the tab, viz. create one more tab with the same website/webpage.
Ways of do it: 

• Center click on Refresh button (history is lost)
  
• Ctrl + Refresh (history is lost)
  
• Drag (favicon onto the tab bar) (history is lost)
• Ctrl + Drag (tab into the tab bar) (history is not lost :) )