Slow and Reverb for YouTube by Slow & Reverb

It lets you adjust playback speed and reverb in real time while media is playing, along with bass, tone, stereo width, and reverb space. You can use built-in presets or save one custom preset locally in browser storage.

Features:
- Real-time speed control
- Real-time reverb control
- Bass, tone, width, and space controls
- Built-in presets
- Save one custom preset locally
- Works on YouTube and YouTube Music

The add-on runs only on supported YouTube domains and processes audio locally in the browser. It does not upload media, browsing data, or account information to external servers.

YouTube is a trademark of Google LLC. This add-on is independent and is not affiliated with or endorsed by YouTube or Google.