Privacy Policy - Volume Booster
Last updated: 8 July 2026
Volume Booster is built to work entirely inside your browser, so it collects nothing.
What we collect
Nothing. The extension does not collect, transmit, sell, or share any data. There is no analytics, no telemetry, no external server, and no account. Nothing about the pages you visit, or the audio/video on them, ever leaves your device.
How it works
- Boosting volume beyond the browser's native 100% ceiling (up to 1000%) is done by routing each
<video>/<audio>element on the page through a Web Audio API gain node, entirely in your browser's own audio pipeline. No audio or video content is read, recorded, or sent anywhere - the extension only adjusts playback level. - Bass, treble, and voice-clarity EQ, dynamic range compression, automatic gain control, loudness normalization, mono downmix, and Safe Listening Mode are additional nodes in that same local Web Audio graph. All processing happens in real time on your device and is discarded once playback stops.
- Per-site volume memory remembers the levels you've dialed in for a given site so they're restored automatically next time, entirely on your device.
- Keyboard shortcuts are handled by Chrome's built-in
commandsAPI and relay a message to the active tab's content script - no separate permission or external service is involved. - Protected (DRM) audio, such as Netflix or some streaming players, can't be routed through Web Audio; the extension falls back to the browser's native volume control for those elements, capped at 100%.
What is stored on your device
Two things, both in chrome.storage.local on your own machine:
- Per-site settings - volume and EQ/dynamics levels you've set, keyed by the site's hostname, so they're restored on your next visit.
- Global defaults - the extension-wide defaults you set on the options page.
You can clear either at any time from the options page, and everything is removed if you uninstall the extension.
Permissions, and why
| Permission | Why it's needed |
|---|---|
storage |
Save your per-site and global audio settings locally. |
<all_urls> |
Attach the Web Audio processing chain to media on the site you're viewing. |
Data sharing
None. There is no third party, no data sale, and no data sharing of any kind.
Contact
Questions about privacy can be sent to the maintainer via the extension's listing page.