content: tell application "Firefox Developer Edition"
  	
  	tell application "System Events" to tell application process "Firefox Developer Edition"
  		set previousWindowCount to (count of windows)
  		click menu item "New Window" of menu "File" of menu bar 1
  		repeat while (count of windows) = previousWindowCount
  			delay 0.1
  		end repeat
  	end tell
  	
  	set index of window (count of windows) to 1
  	activate
  	
  end tell