The problem seems to be somewhere in WebKitGtk-libsoup-Flash-ALSA stack, not in Nuvola Player. Google Music doesn't work in WebKit's GtkLauncher neither.
MOZ_PLUGIN_PATH=/opt/nuvolaplayer/flash/wrapped \ /usr/lib/webkitgtk-3.0-0/libexec/GtkLauncher \ https://play.google.com/music
The problem seems to be somewhere in WebKitGtk- libsoup- Flash-ALSA stack, not in Nuvola Player. Google Music doesn't work in WebKit's GtkLauncher neither.
MOZ_PLUGIN_ PATH=/opt/ nuvolaplayer/ flash/wrapped \ webkitgtk- 3.0-0/libexec/ GtkLauncher \ /play.google. com/music
/usr/lib/
https:/