Your inbox stays your business.

Yahoo Mail UI Enhancer works locally in your browser. It is built to improve the mail interface without collecting, sending, or sharing your information.

LOCAL ONLY
NO DATA OUT

At a glance

This extension operates offline. It changes the appearance of eligible Yahoo Mail pages and remembers the options you select.

No telemetry. No analytics. No remote configuration. No network requests.

What stays on your device

The extension uses your browser’s local extension storage only to retain its settings. These values do not leave your browser through this extension.

Sidebar preference: Whether the Yahoo Mail sidebar is concealed.
Unread emphasis: Whether unread messages receive stronger emphasis in dark mode.

What we do not collect

The extension does not collect or transmit personal information, including:

Email content, subjects, attachments, or recipient information
Account identifiers, passwords, or authentication information
Browsing activity, usage data, or device information
Diagnostics, crash reports, analytics, or advertising identifiers

Scope

This policy applies to Yahoo Mail UI Enhancer. The extension is independent and unofficial; it is not affiliated with, endorsed by, or sponsored by Yahoo. Yahoo’s own services remain governed by Yahoo’s applicable policies.