Hi, I have a virtual synth called Omnisphere. I open Firefox and go to YouTube, and I'll select a video to play. (I typically do this so I can use the Omnisphere synth to play along to for practicing my keyboard skills. YouTube will play just fine, but when I open Omnisphere, then try to play the YouTube video simultaneously, YouTube will just hang and won't play. I close Omnisphere and YouTube will play fine again. I know you'll think this is an issue with my virutal synth Omnisphere, but the strange thing is, that that same company makes another virtual synth called Keyscape, and when I try playing Keyscape and YouTube together, it works just fine. To me, this seems to be some kind of sharing issue, and likely a sharing setting of some kind. The audio settings in both Omnisphere and Keyscape are identical, so why would one work, but not the other?. I couldn't find any kind of virtual device sharing settings in Firefox or YouTube. The company that makes these virtual instruments has told me that it works fine with Google Chrome and Microsoft Edge, that's why I'm leaning towards the browser being the issue. Any idea what could be causing this? Thanks very much, I appreciate it.

Paul