--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -552,35 +552,28 @@ pref("media.getusermedia.noise_enabled",
 #endif
 pref("media.getusermedia.aec_extended_filter", true);
 pref("media.getusermedia.noise", 1);
 pref("media.getusermedia.agc_enabled", false);
 pref("media.getusermedia.agc", 3); // kAgcAdaptiveDigital
 // capture_delay: Adjustments for OS-specific input delay (lower bound)
 // playout_delay: Adjustments for OS-specific AudioStream+cubeb+output delay (lower bound)
 // full_duplex: enable cubeb full-duplex capture/playback
+pref("media.navigator.audio.full_duplex", true);
 #if defined(XP_MACOSX)
 pref("media.peerconnection.capture_delay", 50);
-pref("media.navigator.audio.full_duplex", true);
 #elif defined(XP_WIN)
 pref("media.peerconnection.capture_delay", 50);
-pref("media.navigator.audio.full_duplex", true);
 #elif defined(ANDROID)
 pref("media.peerconnection.capture_delay", 100);
-pref("media.navigator.audio.full_duplex", true);
 pref("media.navigator.hardware.vp8_encode.acceleration_enabled", true);
 pref("media.navigator.hardware.vp8_encode.acceleration_remote_enabled", true);
 pref("media.navigator.hardware.vp8_decode.acceleration_enabled", false);
-#elif defined(XP_LINUX) || defined(MOZ_SNDIO)
+#else
 pref("media.peerconnection.capture_delay", 70);
-pref("media.navigator.audio.full_duplex", true);
-#else
-// *BSD, others - merely a guess for now
-pref("media.peerconnection.capture_delay", 50);
-pref("media.navigator.audio.full_duplex", false);
 #endif
 // Use MediaDataDecoder API for WebRTC, this includes hardware acceleration for
 // decoding.
 pref("media.navigator.mediadatadecoder_enabled", false);
 #endif
 
 pref("dom.webaudio.enabled", true);