[debugnik]

Unless you purchased some service from them, you didn't donate to Firefox, because that's a Mozilla Corporation project. Donating to Mozilla Foundation funds their initiatives, but not Firefox.

To Thunderbird, however, we can actually donate to.

[anonymousab]

At one point, paying for Mozilla's mullvad rebadge would give money to the corp. If you were already going to pay for a VPN, then it's effectively a donation.

Though, just because money goes to the corp, doesn't mean it will contribute to Firefox' development either.