Back in January 2011, Zynga hired the team behind the Flock social browser for the talent. On April 26th, support for the Flock browser will end. Flock started off on the Mozilla platform, but ended up switching over to Chromium. At its peak, Flock had about 10 million users. Below is the message that Flock is sharing with their users:

Social gaming company Zynga has acquired Flock, the web browser built around social networks. Word on the streets is that Zynga was most interested in the team behind Flock. Flock was founded by Bart Decrem and Geoffrey Arone. Ever since Flock started in 2005, they raised $30 million in funding. Flock’s last round of funding was in 2008. Google and Twitter were also involved in the bidding process for Flock.

Flock is a social media browser that is facing some competition with a new browser called RockMelt. Flock has intensified their competition with RockMelt by increasing the speed of their browser and enhancing its functionality in version 3.5. Flock 3.5′s sidebar has Facebook, Twitter, and LinkedIn integration and there are link-sharing features built-in.

“We are thrilled to close this significant round of financing,” stated Shawn Hardin, CEO of Flock. “Following the tremendous market response to Flock’s commercial release, this new funding will enable us to continue our browser innovation – making engagement and participation across social networks and the Web as effortless as consumption.”

Flock is an open source social networking browser built around other open source layout engines.  Flock was created using Javascript, DOM, XUL, and XPCOM.  Yesterday Flock announced that they have raised $15 million in Series D funding.  The funding was provided by Fidelity Ventures, Bessemer Ventures, Catamount Ventures, and Shasta Ventures. 

With the new round of funding, Flock plans to expand business for R&D, marketing, and expansion.  Flock stated that this round of funding was higher than prior investments and that revenue has risen 400% since Jan. 2008.  And Flock’s user base increased by 250% since Jan. 2008.

Information Source:
[1] Flock Press Release