UserAgent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0

Steps to reproduce the problem:
Let me know, please, if this is the wrong place to discuss this suggestion.

I frequently run into the problem that I am prompted with libnotify notifications (the default notification system on Linux) during a Hangouts meeting. This is especially annoying when presenting your screen. 

It can also pose a security concern if you are revealing sensitive information through that notification. 

I suggest a feature for either the browser or Hangouts to provide a setting that suppresses notifications while Hangouts is running.

What is the expected behavior?

What went wrong?
What are your thoughts? Would you be willing to consider it?

Thanks!

WebStore page: https://chrome.google.com/webstore/detail/google-hangouts/nckgahadagoaajjgafhacjanaoiihapd

Did this work before? No 

Chrome version: 60  Channel: dev
OS Version: Ubuntu MATE 17.10
Flash Version: Shockwave Flash 26.0 r0