Zenlo volume optimizer
Boost video volume beyond 100% and enhance your audio with custom sound modes like Bass Boost and Vocal Clear. Tweak Volume and enhances the audio of videos on any website.
2 users
Last.fm Artwork Upload Helper
Streamlines the process of uploading album artwork to Last.fm with visual missing artwork indicators, multi-source search, and direct one-click uploads.
2 users
Khan Academy Correct Answer Sound on SAT Prep
Brings back the sound when you get an SAT prep answer correct on Khan Academy.
2 users
IG Reels Toolkit
Better desktop controls for Instagram Reels and videos, including exact duration, seek bar, skip buttons, playback speed, mute control, keyboard shortcuts, and a draggable floating panel.
Filters & Themes for Discogs
Filter the Discogs marketplace by shipping, condition, sleeve grade and country; sort by real total price (item + shipping); play any track; and theme the whole site. No account, no tracking.
2 users
Video Control Panel
Control video speed up to 16x and boost volume up to 500%, modern design with dark and light mode support.
2 users
YouTube Player Enhancer
Make YouTube Feel Rich, like VLC — seekbar stays hidden on Space/arrow/volume keys, force 16:9 with vertical stretch slider, customize subtitle style. Perfect for keyframe hunting & distraction-free viewing.
2 users
Slowed & Reverb
Real-time speed, reverb, EQ, and stereo effects for YouTube™, YouTube Music™, and Spotify. Processing stays on your device.
Discogs Edit Helper
Imports metadata from web stores and plain-text tracklists, extracts info from titles and assigns data to the appropriate fields.
2 users
JSK SoundShape — Equalizer & Volume Booster
Per-tab 10-band equalizer, volume boost and per-site profiles. Runs on your device — and tells you when a tab cannot be processed.
TuneDock for Spotify & Youtube
Control Spotify and YouTube from the Firefox sidebar or a floating widget. View what's playing and control playback, seek, volume, shuffle, repeat, device selection, and more — without leaving your current tab.
Tab Volume Mixer & Booster
Easily control volume and mute audio for individual browser tabs with custom volume sliders and booster.
