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+++ b/docs/webrtc.md
@@ -1,5 +1,7 @@
 # H.264 / WebRTC
 
+!! warning "Only main browsers are supported. Chrome/Firefox"
+
 This is a new alternative video transfer mode available for Raspberry Pi 4 users with an HDMI-CSI bridge (including PiKVM v3 HAT).
 It uses H.264 encoding instead of MJPEG and provides significantly less traffic consumption. ZeroW is NOT supported.