Nightsorrel privacy policy

Nightsorrel: Dark Mode for Websites, published by Zydeno. Effective 3 November 2026.

What is stored

The extension stores data only in your browser (storage.local): your on and off choices per site, brightness, contrast and sepia values, the engine choice, your schedule hours, your site list, a note that the welcome tour has been shown and the time of the last schedule change. Nothing is sent to Zydeno or anyone else. There is no analytics, no telemetry, no account and no advertising. The extension makes no network requests.

What it does on pages

The extension changes colours on pages you visit, inside your browser. To do that it reads the colours and sizes of page elements. It does not read, store or send the text of pages, what you type in forms, passwords, cookies or your browsing history.

Permissions and why they are needed

• Storage keeps your settings in your browser.
• Scripting applies the dark theme to a page, and registers it so that pages start dark.
• Alarms changes the theme at the times of your schedule.
• Active tab: when you click the toolbar button or press the shortcut, lets the extension see the address of that one tab and darken it, even if you have not given it access to any site.
• Access to sites (optional, asked only when you choose it) lets the theme apply while a page opens, on all sites or on the sites you pick. You can refuse it, or remove it later in your browser's add-on settings.

Your settings file

"Export settings" saves your settings to a file on your computer. That file goes nowhere else unless you send it yourself.

Deleting your data

Remove the extension and your browser deletes what it stored. If you are in the EU or UK, you hold the rights given by the GDPR, but we hold no data about you to act on.

Contact

[email protected]