Gongwharf — Privacy Policy

Product: Gongwharf: Volume Booster & Equalizer, a browser extension for Firefox and Opera.
Publisher: Zydeno. Contact: [email protected]
Effective date: 19 October 2026.

In short

Gongwharf works entirely inside your browser. The extension stores data only in your browser (storage.local); nothing is sent to Zydeno or anyone else; no analytics, no telemetry, no advertising, no accounts and no remote code. It never records, stores or transmits sound.

What is stored, and where

In the browser's extension storage (storage.local) Gongwharf keeps: your settings (remember levels per site, badge on/off, step size, theme, interface language); for each site where you changed the sound, the site's host name (for example lectures.example) with its level, equalizer values, preset name, balance, mono and limiter choice, the time it was last changed, and a flag if boosting silenced that site's player; your own equalizer presets (name and five values); and your Never touch list of host names. Gongwharf does not store page addresses, page titles, browsing history or anything you type.

While the browser is open, the session storage (storage.session) holds the current level of each open tab and which tabs you muted with Mute others. It is cleared when the browser closes.

Uninstalling the extension removes this data. You can remove single sites, presets and Never touch entries on the settings page at any time.

Sound processing

When you raise the level above 100 %, use the equalizer, balance or mono on a site, Gongwharf connects that page's audio and video players to the browser's own audio engine (Web Audio) on your computer. The sound is processed in real time and played back; it is not recorded, analysed for content, stored or sent anywhere. A level meter value is read only to show and test the limiter and is never stored.

In Opera, the optional "Boost the whole tab" mode uses the browser's tab capture for the one tab you chose, only after you click the button and grant the permission. The captured sound is played back through the same local processing and is never recorded or transmitted. Capture stops when you close or leave the tab or click Stop.

Permissions

storage — saves the settings described above in your browser.
activeTab — when you open the popup or press a Gongwharf shortcut, lets the extension work on the current tab only, until you leave that page.
scripting — places the small Gongwharf sound script into pages you allowed, so remembered levels return when a site plays again.
Access to sites (optional) — asked only when you click "Allow on this site" or "Allow on all sites". It lets Gongwharf find the audio and video players on those pages. Gongwharf does not read page text, forms or what you type, and it changes nothing on a page until you change its sound. You can remove this access in Settings or in the browser at any time.
tabs (optional) — asked only when you click "Show tab names", to show the titles of tabs playing sound in the Playing now list.
tabCapture and offscreen (optional, Opera only) — asked only when you click "Boost the whole tab", see above.

Export and import

Export saves your settings, sites, presets and Never touch list to a JSON file on your computer. You decide where the file goes and who sees it; it contains the host names of sites where you changed the sound. Import reads a file you choose, checks it before anything is replaced and asks you to confirm; the previous settings can be restored with Undo right after the import.

Network

Gongwharf makes no network requests of its own. Fonts, icons and translations are inside the extension. The optional "Rate this extension" link opens the store page only if you click it; that site's own privacy policy then applies.

Children

Gongwharf collects no personal data from anyone, including children.

Changes and contact

If this policy changes, the new version will be published at this address with a new effective date. Questions: [email protected].