Flock, a social-focused browser startup that has raised nearly $30 million in venture funding, has ceased building on top of the open source Firefox browser, say multiple sources. The next version of the Flock browser will be built on Google’s open source Chrome browser platform. The last version of Flock was released in October 2008.
In the past Flock has said all it needs is a few tens of millions of users to score big dollars from the search engines (each active user generates $5 or so in search engine revenue). But after three years of trying, Flock hasn’t been able to achieve more than a fraction of that number of users.