Privacy Policy — Proxy Manager & User Agent Switcher
Last updated: April 12, 2026

Chrome Extension
Firefox Add-on
This Privacy Policy explains how the Proxy Manager & User Agent Switcher browser extension by SEOULTRA handles data. The extension is designed with privacy first — no data leaves your device.

What we store
All settings are saved locally on your device using the browser's built-in storage API (chrome.storage.local / browser.storage.local):

Proxy configuration: scheme (HTTP/HTTPS/SOCKS4/SOCKS5), host, port, bypass list, enabled state
User-Agent preferences: selected preset or custom UA string, enabled state
No data is stored on external servers.

What we do NOT collect
No browsing history, URLs, or page content
No IP addresses or device identifiers
No proxy credentials or authentication tokens
No analytics, telemetry, or usage tracking
No cookies or fingerprinting
No personal information of any kind
Network requests
The extension makes zero network requests to our servers. The only outbound request is a connectivity check to google.com/generate_204 (a standard no-content endpoint) to verify your proxy connection is working. Proxy traffic flows directly through the proxy server you configure — we do not see, intercept, or log it.

User-Agent modification
When the User-Agent Switcher is enabled, the extension modifies the User-Agent HTTP request header using the browser's declarativeNetRequest API. This happens entirely within the browser — no external service is involved.

Permissions explained
proxy — Sets the browser's proxy configuration. Required for the core proxy feature.
storage — Saves your settings locally on the device. Nothing is synced or uploaded.
declarativeNetRequest — Modifies the User-Agent request header. Only active when the UA Switcher is enabled.
<all_urls> — Required so the proxy and User-Agent override apply to all websites. No page content is read or collected.
Third-party services
This extension does not integrate with any third-party analytics, advertising, or tracking services. There are no SDKs, pixels, or beacons.

Data sharing
We do not sell, share, or transfer any data to third parties. Because all settings are stored locally in the browser, nothing is transmitted to us or anyone else.

Open source
The extension is fully open source. You can audit every line of code:

GitHub Repository
Children's privacy
This extension does not knowingly collect any data from anyone, including children under 13.

Changes to this policy
If we update this policy, the changes will be posted on this page with an updated date. Since the extension collects no data, we do not anticipate material changes.