Funny because Microsoft also recently dropped support for Firefox for Xbox GamePass Cloud Gaming on Android. I say “dropped support” but really they stopped letting you use the purpose built app and are now forcing you to use browser but the only “supported” browsers are Chrome and Edge. Firefox works, but they forcefully disconnected me after 5 minutes so it’s not a matter of compatibility. They just want that traffic going through Edge ideally but they do still support Chrome, for now.
It looks like this 3.2M is the difference of the popular vote Trump received over Harris. A rough search looks like about 56.5% voter turnout amongst voting age population.