No, Mozilla is a non-profit -- you may just misunderstand charitable structure optimization. It has a for-profit public-benefit subsidiary called Mozilla Corporation (Firefox).

This is common in non-profits for a number of reasons: protects the foundations assets, allows for engaging in commercial operations (Mozilla VPN, Anonym), greater flexibility, etc.

It is not a true for-profit company. All "profit" flows up to the non-profit and the non-profit parent retains complete, absolute control while being tied to the Mozilla mission.