I wanted to make a new topic for this to make it easier to find.
For Linux users who use my Fantasy Grounds Syrinscape Sounds extension and the Syrinscape Online player, I have created a simple Syrinscape Online player URI handler, so that sounds triggered in Fantasy Grounds will be picked up and played properly. I have only tested this on Ubuntu and I am not a Linux guru, so I can’t guarantee it with any other version of linux.
Source Code and files:https://github.com/mattekure/Syrinscape-Online-URI-Handler/releases
For Linux users who use the Fantasy or Sci-Fi players, another community member has developed a URI handler for them. Linux URI handling