I found that when using Firefox with smaller screen size (tablet and mobile view), the messenger widget does not show up like desktop. Not only on my application, but also any website that use Intercom.
My current environment:
Hey 
Jacques here from Support Engineering.
It looks like this question is specific to your own workspace.
I think our Support team would be best placed to handle this for you! I’d encourage you to contact them through the Messenger and they’ll reply as soon as they can!
Already have an account? Login
No account yet? Create an account
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.