The new Flock 3.5, based on the Google Chromium browser engine, lets users connect to and view all of their social networking in a single browser interface. Flock can pull in content from social networks, newsfeeds, Flick, and YouTube.
For most of its life Flock was based on the Firefox browser engine, earlier this year the browser was reconfigured to run on the Chromium engine that powers Google Chrome (and RockMelt as well). From a usability and speed standpoint, this has been an improvement. But it definitely causes some problems when it comes to figuring out how to use Flock.
Over time, Flock has done a good job keeping up with changes in collaboration and social networking. With the newest release, Flock 3.5, the browser showcases a much broader support for social networking tools than the much newer RockMelt beta.