Volume Booster
Boost your Firefox tab volume beyond 100%! Easily amplify sound up to 500% with a clean and simple interface. Perfect for quiet videos, music, or low-volume streams.
7,369 人のユーザー
Youtube Speed Control
Control speed of the youtube playback using the keyboard. Press '+' to increase and '-' to decrease the playback speed. Or Shift + mouse wheel . That plugin doesn't work together with "Enhancer for YouTube™"
7,013 人のユーザー
Volume Control for Bandcamp Player
It's a volume control for Bandcamp audio player. The extension adds another slider (somewhere around the one that controls the track progress) to control the volume.
6,252 人のユーザー
Youtube Background Play Fix
Enables background audio playback for YouTube and YouTube Music. Prevents the video from pausing when you switch tabs or minimize the browser. Works both on Firefox Android and Desktop.
6,173 人のユーザー
YouTube Downloader
YouTube Downloader – Free YouTube Video Downloader & MP3 Converter | 4K Support Easily download YouTube videos in MP3, MP4, HD, or 4K with this fast and free Firefox extension. Convert YouTube to MP3 or download videos in any format with one click.
6,061 人のユーザー
Better Lyrics (Lyrics for Youtube Music)
Enhance YouTube Music with beautiful time-synced lyrics, multilingual support, real-time translations and more
4,082 人のユーザー
Theater Mode for YouTube™ (YouTube Wide Screen)
Force YouTube to open in its player in the theater mode
3,930 人のユーザー
AI Toolbox
Ultimate AI assistant! Access all AIs anywhere and boost your productivity: ChatGPT, Gemini, DeepSeek, Grok, Copilot, Claude, Llama, Qwen, Mistral AI, Perplexity, Poe, Narrow AIs and much MORE! 💖 No user information is collected by the developer
3,859 人のユーザー
Cast Kodi
Cast videos and music from more than 50 sites (YouTube, Twitch, Vimeo, SoundCloud, torrents, …) to Kodi with context menu and remote control.
3,581 人のユーザー
Audio Output Selector
Allows you to change the audio output device of <audio> and <video> elements. Requires media.setsinkid.enabled set to true in about:config!
3,419 人のユーザー
YtMp3 - YouTube MP3
Easily convert YouTube videos to MP3 or MP4 files and download them for free.
3,266 人のユーザー
オーディオ/ビデオのスピードアップ
再生速度を高速化します。すべてのHTML5ビデオとオーディオに影響します。 スピードアップ：Ctrl+Shift+U | スピードダウン：Ctrl+Shift+Y
3,141 人のユーザー
YouTube Converter
Our YouTube Converter allows you to convert your favourite YouTube videos to MP3 or MP4 files, and download them for free.
3,132 人のユーザー
Background Playback Helper (YouTube & Vimeo)
Keeps video playback running on YouTube, YouTube Music, and Vimeo when switching apps, tabs, or turning the screen off by maintaining visibility and sending harmless key activity. Supports Firefox for Android and Desktop.
2,993 人のユーザー
SoundCloud Downloader
Adds a button under SoundCloud tracks for instant download as mp3 with metadata!
2,922 人のユーザー
