Osprey is a browser extension that protects you from malicious websites.

LinkedIn Page • Privacy Policy • Wiki (FAQs) • MalwareTips • Wilders Security

Osprey has officially partnered with industry-leading security companies to provide you with the best protection possible. Check out some of our partners below:

Osprey also relies on local filtering lists from the following open-source intelligence providers:

Osprey is endorsed by several well-known organizations that recommend the extension for improved browser protection. Check out some of our endorsers below:

Our mission is simple: become the most trusted, transparent, and effective browser protection extension for home users and businesses by empowering open-source intelligence to combat malware, phishing, and scams across the globe. The best protection is free protection, and building a privacy-first, open-source tool that IT teams, security researchers, and end-users can trust to secure their browsing, wherever they go, is the best way to provide it.

Osprey is committed to being non-profit, non-commercial, and open-source, forever, with no plans to monetize the project in any way. Unlike other free browser extensions, Osprey doesn't collect, profile, or sell your browsing data behind your back. We're committed to being as transparent as possible. Osprey runs locally on your device with zero telemetry, user-identifiable back-end analytics, or user accounts needed. Check out our Privacy Policy here for more info.

The more protection providers join the project, the better the Osprey threat intelligence platform becomes. If you're interested in improving global threat intelligence and want to join the project, feel free to get in contact with us at [email protected].

If the website is malicious, Osprey will block the page and display a warning:

From this page, you can report the website as safe, always ignore the website, go back to safety, and continue anyway. By default, Osprey creates a browser notification for blocked pages that you can toggle on and off using the context menu. You can hide the continue and report buttons, lock down the protection options, and even hide the context menu entirely using the system policies.

You can configure the extension's protection options in the settings:

If you're unsure about the functions of each protection provider, it's best to keep the default settings.

You can restore them by right-clicking the extension icon and selecting Restore default settings.

Osprey blocks websites that are classified as:

• Malicious
• Phishing
• Untrusted
• Adult Content

The following providers are enabled by default:

• AdGuard Security DNS
• alphaMountain Web Protection
• PrecisionSec Web Protection
• CleanBrowsing Security DNS
• Cloudflare Security DNS
• PhishDestroy Feed
• Phishing.Database Feed
• Quad9 Security DNS
• Switch.ch Security DNS

The following providers are disabled by default:

• CERT-EE Security DNS
• Control D Security DNS

• AdGuard Family DNS
• Control D Family DNS
• CleanBrowsing Family DNS
• Cloudflare Family DNS

Providers disabled by default are either due to:

• Ineffective protection results in testing
• Frequent reports of false positives
• Failure to respond to false positive reports
• Being an optional adult content filter

If a provider gives you false positives, report the links to them directly and disable them in the Protection Options panel if needed. Osprey is designed to be customizable, so you can enable or disable any of the providers at any time. Osprey does not have control over the providers' databases or how they classify URLs.

Osprey: Browser Protection uses the names of third-party DNS and security providers solely for descriptive and interoperability purposes. All trademarks, logos, and brand names are the property of their respective owners.

Osprey is not affiliated with or endorsed by any of the third-party providers listed in the extension, unless stated otherwise. Use of their services is subject to their respective terms of use and privacy policies.

If you represent a listed provider and have questions, feedback, or concerns regarding attribution or inclusion, please contact us at [email protected].

For support or queries, please open an issue in the Issues section.