You don't need an accountant for that - you can read the financial statement (this one is pretty simple). From about $593mil revenue in their income statement

You don't need an accountant for that - you can read the financial statement (this one is pretty simple). From about $593mil revenue in their income statement (page 4), $510mil is derived from _Royalties_. Later, on page 13, they explain what _Royalties_ consists of, and I quote: > Royalties - Mozilla provides the Firefox web browser, which is a free and open-source web browser initially developed by Mozilla Foundation and the Corporation. Mozilla incorporates search engines of its customers as a default status or an optional status available in the Firefox web browser. Mozilla generally receives royalties at a certain percentage of revenues earned by its customers through their search engines incorporated in the Firefox web browser. Now, I leave it to your judgement if you think that a company that derives 86% of its revenue from the above is dependent on Google ;-)