Firefox audio issues
Firefox is not playing in any external audio device(Bluetooth speaker or headphones). But it is audible directly from my laptop. The audio devices play from all other applications like vlc.
Additional System Details
- User Agent: Mozilla/5.0 (Linux; Android 7.1.1; Moto E (4) Plus) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Mobile Safari/537.36
firefox doesn't have audio drivers that is controlled by the O/S and sounder. Did you test the sound setup? Also vlc isn't a Browser so that doesn't tell us much.
I checked all the settings and they appear to be in order. As for another browser, the earphones and speakers are working for chrome.