Flock is the new “social” web browser based on Mozilla’s Firefox source code. They recently released a “developer preview” for those of us that must try every piece of bleeding edge software. Flock’s claim to fame is its ability to integrate with web services like Flickr, del.icio.us, and blogging software. Most people aren’t willing to jump ship without their Firefox extensions though. You can force an extension to install by unpacking the .xpi and replacing the version checking code. Whether the extension works or not is still up in the air. Geoff has all of the details you need to port extensions to Flock.