<disclaimer>I'm a Moco employee</disclaimer> I don't know who told you that Mozilla was required to spend all $300M each year, but looking at the financial from

<disclaimer>I'm a Moco employee</disclaimer> I don't know who told you that Mozilla was required to spend all $300M each year, but looking at the financial from past years will show you that it's not that clear (https://www.mozilla.org/en-US/foundation/annualreport/2013/ https://www.mozilla.org/en-US/foundation/annualreport/2013/) The apartment in Paris is actually a way to spend less compared to sending people that visit the Paris office to hotels. Bonuses are not >40%/yr, this is the absolute maximum, and it has never been 40% per year in the last 4 years. It's true that compensation at Mozilla is good, but you need that to be competitive on the job market. Donations are important for the Mozilla Foundation to keep a non-profit status. The Yahoo! deal is a Mozilla Corporation deal, so that's a different story (Mo Corp pay taxes like any company).