On Chrome, you can force to keep a tab alive in chrome://discards/

app.py

@@ -306,7 +306,7 @@ Leave a star on the Github <a href="https://github.com/coqui-ai/TTS">TTS</a>, wh
             elem_id = "submit-id"
         )
         
-        warning = gr.HTML(value = "<center><big>Your computer must <u>not</u> enter into standby mode.</big></center>", visible = False)
+        warning = gr.HTML(value = "<center><big>Your computer must <u>not</u> enter into standby mode. On Chrome, you can force to keep a tab alive in <code>chrome://discards/</code></big></center>", visible = False)
 
         synthesised_audio_1 = gr.Audio(
             label="Synthesised Audio #1",