Firefox add-on with keyword - audio

Stylish audio equalizer in toolbar popup.

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Stream just the audio from YouTube to save bandwidth and battery life

Convert any streaming audio to MP3 and download it to your machine.

Easily download most popular audio formats.

Download YouTube videos in all available formats and extract the original audio files

Compress audio to make sound volumes more even

Easily record audio from your computer's microphone!

Easily download video & audio streams via toolbar popup.

Easy to use video and audio converter and muxer written in WebExtension built on top of the well-known FFmpeg converter

Allows you to change the audio output device of <audio> and <video> elements. Requires media.setsinkid.enabled set to true in about:config!

Select audio output device for each tab.

Speeds up playback. Affects all html5 videos and audio. | Speed up: Ctrl+Shift+U | Speed down: Ctrl+Shift+Y

Helps you fix annoying sound problems on sites like YouTube: audio in one channel only, too quiet or too loud. (Unfortunately, this extension does not work on all websites because of cross-domain issues — but it does work on YouTube!)

Listen to audio (no video) in YouTube and all embedded videos.

Globally control audio equalization and volume level of media elements

FFmpeg-based audio player that supports all known audio formats

Control audio equalization and volume level of YouTube and YouTube Music

Listen to Youtube audio, no video is downloaded (save CPU, GPU, bandwidth and battery) It doesn't work on all videos. (Some videos doesn't provide audio only stream.) Live is not supported.

A powerful media player built on top of the video.js project with HTTP Live Streaming (HSL), speed control, and playlist support

Audio Voice Recorder is a free web app that lets you record your voice.

Convert any audio file to selected formats (i.e. mp3) inside your browser!

This extension enables you to set the video/audio volume for each website separately. - facebook.com - 9gag.com - bandcamp.com - ... and many more

Fix wireless audio streaming delay for YouTube

Transkriptor, a browser extension powered by AI, revolutionizes transcription by making it fast, efficient, and user-friendly. Developed by expert engineers, it simplifies converting audio to text directly in your browser without extra software.