Download Flock: Secure chat for Teams and Businesses chrome extension. Flock is a simple, FREE messaging app built specially for teams and small businesses. and install in your Google chrome browser. This is Direct Flock: Secure chat for Teams and Businesses Crx download for Chrome it is also called Flock: Secure chat for Teams and Businesses offline CRX for chrome Download. This Flock: Secure chat for Teams and Businesses is used to Flock is a simple, FREE messaging app built specially for teams and small businesses.