HI Zepye2012, Thank you for your question. Unfortunately I am not entirely sure what you are experiencing. In order to further investigate, can you please respond with an example webpage that this is happening and the information from the [about:support] page of Firefox for android? For sound issues: the only two audio features in about config I know of are media.audio_data.enabled and useAudioChannelService which are both false. Please also try to control your media volume from the phone sound settings. [[What to do if Firefox won't play any sounds]] - for desktop.