Which is probably true; Google is unlikely to spend half a billion a year on Mozilla's advocacy efforts.
AFAIK, Google's money goes to the Mozilla Corporation, while the donations go to the Mozilla Foundation. So the advocacy is already separated, isn't it?
> It also handles relationships with businesses, many of which generate income. Unlike the Mozilla Foundation, the Mozilla Corporation is a tax-paying entity, which gives it much greater freedom in the revenue and business activities it can pursue. From 2004 to 2014, the majority of revenue came from a deal with Google, which was the default search engine in the Firefox web browser.
> In CY 2018, Mozilla Corporation generated $435.702 million from royalties, subscriptions and advertising revenue compared to $542 million in CY 2017. 2017 was an outlier, due in part to changes in the search revenue deal that was negotiated that year. Despite the year-over-year change, Mozilla remains in a strong financial position with cash reserves to support continued innovation, partnerships and diversification of the Firefox product lines to fuel its organizational mission.
However, as noted earlier, the corp does pay for the foundation's advocacy:
> A portion of search revenue combined with grants and donations is used to fuel the advocacy and movement building work of the Mozilla Foundation and its broad network of supporters of Mozilla’s mission.