The Mozilla Corporation is a wholly owned subsidiary of the Foundation. It is _not_ a nonprofit and develops a web browser as well as most other software you would associate with "Mozilla". It pays dividends to the Foundation which the Foundation uses, alongside donations, to fund its work. The Corporation pays taxes on its profits, like any other corporation that is not explicitly a nonprofit. Note that I am explicitly not using "for-profit" to describe the Corporation, because profit is not the Corporation's goal. Again, the only shareholder in the Corporation is the Foundation, though they do have separate boards and somewhat separate governance.