Messenger for Desktop is just a wrapper for the official client messenger.com, so it does not have an interface of its own. It works exactly like Chrome does, but as a stand-alone app.
Features Facebook Messenger Desktop:
*Convenient communication with your friends;
*Edit the name and surname of your friends to your list.
*Opportunity for each of the chat rooms set your color correspondence;
*Ability to attach a notice to your desktop how to connect and disconnect with one touch;
*Support group chat;
*Voice support audio / video calls;
Installation latest version into Linux Mint:
1. Download DEB package
2. Install it
3. Run & enjoy