fey42 said Is this an example of what you referenced? user_pref("media.webrtc.debug.aec_log_dir"

fey42 said

Is this an example of what you referenced? user_pref("media.webrtc.debug.aec_log_dir", "C:\\Users\\Fred\\AppData\\Local\\Temp"); Thanks, Fred

Precisely what I am talking about. Linux would have trouble with that preference, as the file path that is used in Linux is entirely different.

Officially, Mozilla says not to use the prefs.js elsewhere, but if you edit out prefs such as that which affect cross-OS compatibility I don't think you would have a problem.