Re: sharing xul elements between toolbars

i meant that the functionality of the button in toolbar_2 is same as the toolbar_1. but the styling might be different. so its actually the same button but slightly different. the example i provided is just a example. here the real problem:

i want to create a toolbar in fullscreen mode. it will contain the back and forward button just like the normal view(defined in browser.xul) but i would like to style it differently. also there is some other features like a url bar with a smaller width. so i would need to use the same url bar as the normal view but i would need to change css to give it a smaller width.

how to achieve this? is this possible using the DOM?