Comment 121 for bug 386150

@Marcus ,
The Firefox style , i think you got it from Danielsan's explanation... if not, firefox drop-down shows both the Back & Forward locations

Other problems I found
1: The Search button is too close to breadcrumbs , its now easier to trigger this bug > https://bugs.launchpad.net/hundredpapercuts/+bug/57210

2: Right side is very empty.
I have attached a screenshot of my setup [it the same as yours but I'v added separators, before the breadcrumbs ,also i replaced Home with Up, other than that it is the same] > It Shows the emptiness of the right side

To avoid the search bug, I'v added a mockup,
Its better to move it to the search to the right, just to the left of the spinner.
This also partially negates the emptiness of the right side of the browser.