We will do a lot of application such as open a new tab,save image,undo,using search engine etc as browsing with Firefox,especially using right click mouse.Now you having the simply way to run these application without any right click of the mouse,just use drag and drop method.
Drag and Drop Zones is a Firefox addon.It will separate a number of different function region in the background as indicated above photo,then assigned any search engine or right click menu of application to each region.
If you use Google for searching,just highlight the sentence ,then drag to the region that assigned for Google search,the result will display immediately.
Please try it.
Cool but doesn't sounds useful for me :P