Oh, man! Customizing the right-click menu would be clutch.
I would imagine 95% of users never touch these red options. I agree they should be there as the default (for people who won't know where to look), but for everyone else, I'd love to be able to tweak these.
This could be a huge differentiating factor between Chrome & Firefox, too, BY THE WAY.
Keep them on as default, but allow us to edit/remove/re-order even them.