Scroll tab bar without activating tabs

[bckman]

How can I scroll between all the active tabs without activating tabs? I want to be able to scroll through all the tabs in a window without changing the active tab. Basically the same behavior that you have in Firefox.
The left/right scroll buttons have this behavior but I can't find a way to apply their implementation to my implementation of the QTabBar because it's hidden behind the d-pointer of QTabBar.
What would be the best way to approach this problem?

Thanks in advance.