Mozilla's stated purpose for dropping ads in the new tab page -- to diversify its sources of revenue -- makes sense: In 2012, the last year for which the organization has released financial figures, revenue from its contract with Google accounted for 88% of the Mozilla Foundation's $311 million income. Royalty payments from Mozilla's multiple search deals -- which makes various search engines the default in Firefox -- represented 98% of 2012's revenue.
The most lucrative of those deals, the one with Google, expires in November.
Firefox Nightly v. 34 for Windows, OS X and Linux can be downloaded from Mozilla's website.
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