diff --git a/public/src/tts.js b/public/src/tts.js
index bd8c24a..8bdbf11 100644
--- a/public/src/tts.js
+++ b/public/src/tts.js
@@ -20,19 +20,19 @@ export function setTTSMode(mode) {
 }
 
 // Detect best audio format for this browser
-// Chrome: mp3 works everywhere, MediaSource supports audio/mpeg
-// Firefox: mp3 may lack decoders on Linux; opus (ogg) always works
-// For MediaSource streaming: only Chrome supports audio/mpeg, nobody supports audio/ogg in MSE
+// Chrome/Edge: mp3 works, MediaSource supports audio/mpeg for streaming
+// Firefox: mp3 decoder often missing on Linux (canPlayType lies), use opus (ogg)
+// For MediaSource streaming: only Chromium browsers support audio/mpeg in MSE
 function detectAudioFormat() {
-	const audio = document.createElement('audio');
-	// Check if the browser can play mp3 at all
-	const canMp3 = audio.canPlayType('audio/mpeg') === 'probably' || audio.canPlayType('audio/mpeg') === 'maybe';
-	if (canMp3) {
-		return { format: 'mp3', mime: 'audio/mpeg', mseMime: 'audio/mpeg' };
+	const isFirefox = navigator.userAgent.includes('Firefox');
+	if (isFirefox) {
+		// Firefox on Linux often claims mp3 support but lacks decoders
+		// Opus in Ogg container always works natively in Firefox
+		console.log("Firefox detected, using opus format for TTS");
+		return { format: 'opus', mime: 'audio/ogg', mseMime: null };
 	}
-	// Fallback to opus (ogg container) - Firefox always supports this
-	console.log("Browser lacks mp3 support, using opus format");
-	return { format: 'opus', mime: 'audio/ogg', mseMime: null }; // MSE doesn't support ogg
+	// Chromium-based browsers: mp3 works, MSE supports audio/mpeg
+	return { format: 'mp3', mime: 'audio/mpeg', mseMime: 'audio/mpeg' };
 }
 
 const AUDIO_FORMAT = detectAudioFormat();