This add-on implements a simple audio mixer for firefox (> 30.0). It works just with HTML5 technologies (HTMLMediaElements, WebRTC and WebAudio). The mixer can be opened from: Tools -> Web Developer -> Firefox Mixer Have fun! Author ~~~~~~ Andrea Marchesini - baku _at_ ippolita _dot_ net License ~~~~~~~ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.