By: Marissa Mayer, Yahoo CEO

Today, I’m thrilled to announce that we’ve entered into a five-year partnership with Mozilla to make Yahoo the default search experience on Firefox across mobile and desktop. Mozilla is an inspirational industry leader who puts users first and focuses on building forward-leaning, compelling experiences. This is the most significant partnership for Yahoo in five years and we’re so proud that Mozilla has chosen us as their long-term partner in search.

At Yahoo, we believe deeply in search – it’s an area of investment and opportunity for us. It’s also a key growth area for us - we’ve now seen 11 consecutive quarters of growth in our search revenue on an ex-TAC basis. This partnership helps to expand our reach in search and gives us an opportunity to work even more closely with Mozilla to find ways to innovate in search, communications, and digital content. I’m also excited about the long-term framework we developed with Mozilla for future product integrations and expansion into international markets.

Our teams worked closely with Mozilla to build a clean, modern, and immersive search experience that will launch first to Firefox’s U.S. users in December and then to all Yahoo users in early 2015. The interactive and integrated experience also better leverages our world-class content and personalization technologies.

Search inspires us because we think it’s something that will change and improve dramatically, and because fundamentally, search is about human curiosity — and that is something that will never be finished.