Mozilla today said that 2013 revenue from its deal with Google was flat compared to the year before, as was its income overall, even as expenses jumped by 42%.

The flat-lining of revenue was in stark contrast to its previous financial statement, which had shown a bullish increase of 88%.

The Mozilla Foundation’s 2013 revenue was $314 million, up half a percentage point from 2012, according to the financial statement released Friday (download PDF).

Mozilla Foundation is the non-profit that oversees Mozilla Corp., the commercial arm that develops the Firefox browser and Firefox OS mobile operating system.

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