
Osprey: Browser Protection by Foulest
Protect against online threats in real-time using multiple browser protection engines.
You'll need Firefox to use this extension
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About this extension
Osprey is a powerful browser extension designed to keep your browsing safe from malicious websites. Using advanced protection services from industry-leading threat intelligence providers, Osprey checks each URL you visit to detect and block malware, phishing, fraud, and other online threats. With customizable settings, you can tailor the extension to meet your needs, ensure protection against threats, and even filter out adult content.
Key Features:
- Multi-layer protection against various online threats
- Real-time checks with trusted security providers
- Alerts for unsafe websites and warnings for blocked content
- Privacy-respecting: no data collection or tracking
Your security matters, and Osprey brings peace of mind to every browsing session.
Key Features:
- Multi-layer protection against various online threats
- Real-time checks with trusted security providers
- Alerts for unsafe websites and warnings for blocked content
- Privacy-respecting: no data collection or tracking
Your security matters, and Osprey brings peace of mind to every browsing session.
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Permissions and dataLearn more
Required permissions:
- Display notifications to you
- Access browser tabs
- Access browser activity during navigation
Optional permissions:
- Access your data for all web sites
More information
- Add-on Links
- Version
- 1.3.2
- Size
- 86.55 kB
- Last updated
- a day ago (15 Jul 2025)
- Related Categories
- Licence
- GNU General Public Licence v3.0 only
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Tags
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Release notes for 1.3.2
- Allow site button now permanently adds to allowed cache
- Fixed blocked cache integration with alphaMountain
- Disabled Norton Safe Web by default due to false positives
- Cleaned up code
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