True but they can't rely on the US alone. They have to do business elsewhere. Funding Firefox is a ridiculously cheap way of making sure they can operate with impunity everywhere. It's brilliant, really.

It is bad enough if anti-trust actions get moving against a functional monopoly in the EU. Really bad for business ... of the monopolist.

They would just have to funnel the money, one last time, but to a different direction. It's not corruption if "he" takes the money...