Homemade Bread is an iOS 9 jailbreak tweak that makes the Home button breadcrumb-aware. This means that when an app forwards you to another app and there’s a “back to app” button in the upper left-hand corner, then a press of the Home button will go back to the previous app instead of closing the current app. The end result is a tweak that lets you use the Home button to activate iOS 9's new breadcrumb links that appear in the status bar.
How to use the Home button to activate breadcrumb links [jailbreak]