Mozilla needs funding, it's not uncommon to do this in browsers.
Do they need more funding? They made $163 million in revenue in 2011 after which they signed a $300m/year deal which ends this year, all of this and most of their money in general is provided by Google.
Sounds more like a play for independence.
https://news.ycombinator.com/item?id=7220125
https://news.ycombinator.com/item?id=7223436
https://news.ycombinator.com/item?id=7230094
Links from mozilla's blog:
https://blog.mozilla.org/advancingcontent/2014/02/11/publish...
https://blog.mozilla.org/advancingcontent/2014/02/13/more-de...
See http://www.computerworld.com/s/article/9244250/Mozilla_banke... .
Makes you miss all the porn\antivirus popups...