While it could be a driver/hardware solution, I know that windows supports it, (I'm sure linux too), so it could be an OS solution, and my guess is that it woul

While it could be a driver/hardware solution, I know that windows supports it, (I'm sure linux too), so it could be an OS solution, and my guess is that it wouldn't be too much work (tm) to add it. However, as other have said, adding just one feature isn't too bad, but 1000 people wanting just one feature becomes unmanageable, and ChromeOS is intentionally slim. There are mice with built in profiles such as the Razer and Logitech series that can switch the mice buttons (and have a button to toggle the profile). They aren't crazy expensive either, the logitech one is ~30$ IIRC.