It's very cool that your whole workplace uses Ubuntu!
It looks like you can login to the chat via web browser (https://rocket.chat/docs/user-guides/connecting-to-a-server/)
So, theoretically a UT webapp could be used in this situation. I would say, try loging into the rocket chat that you use in morph browser on UT. If that works, then you should be able to get it going in a webapp.