They're not free to make that sort of modification to Firefox. Patches for Firefox (and a number of other Mozilla products) need to be vetted by MoCo, and I do

They're not free to make that sort of modification to Firefox. Patches for Firefox (and a number of other Mozilla products) need to be vetted by MoCo, and I doubt they'd be approved. They are, of course, allowed to rebrand and then make all the modifications they wish. This was the impetus for the creation of Iceweasel.