How to login to from desktop

Sorry if this has already been asked. I Linux machine with Firefox browser. I also have the telegram desktop. But the deep link doesn’t seems be triggering the desktop app to initiate sign in.

How are people here doing it ?

What distro? I am using Ubuntu + Firefox 58 and it asked how I wanted to handle opening tg:// links

Did you download the app from

@madamelic It’s an Ubuntu + Firefox Quantum (57)

So it was a problem with Firefox Quantum I guess. The 56.0 version of firefox worked just fine !