Which version of FA does the latest IPS support?

From Credits.txt:

Quote

FontAwesome
    Description: General icons for UI
    Location: Font files in applications/core/interface/font and CSS in development in applications/core/dev/css/global/framework/fonts.css (mixed with other CSS and modified to use correct path to font files)
    Included version: 4.7.0
    Website: http://fortawesome.github.com/Font-Awesome
    License: http://fortawesome.github.com/Font-Awesome/#license

 

But the latest version is 6.5.1... 🙂

20 minutes ago, Safety1st said:

But the latest version is 6.5.1... 🙂

It is indeed. 

Is it safe to use custom app for enabling FA 6 support?

This is something you would need to ask the author of that custom application. We are unable to provide any guarantee on 3rd party applications.

you can look here as well . 6.4.2

https://forum.invisionize.pl/files/file/837-axen-font-awesome-6-in-ips/

That's the place I found before topic creation 🙂