With the new Firefox View [that is a great thing] how about there will be more things like history, downloads and that stuff and then you could customize it. Custom background, the user will choose if they want history but not downloads. That would be pretty cool not gonna lie.
Also i attached an image of how the Firefox view would look like with the customize button [its really bad if they do add that in its gonna be more fancy i also spent way too much time on that]
Edit: Just saw a suggestion to blend view and new tab together. Could so maybe it could be editable new tab?