SYNTEX Privacy Shield by SYNTEX Security
Blocks trackers and strips browser fingerprinting headers so websites can't identify or profile you. Runs entirely in your browser. No data leaves your device. Free forever. Donations welcome.
Available on Firefox for Android™Available on Firefox for Android™
1 User1 User
Extension Metadata
About this extension
SYNTEX Privacy Shield v4.0 — rebuilt from the ground up.
WHAT IT DOES
Tracker Blocking
Blocks outright requests to known analytics and surveillance infrastructure:
Google Analytics, Facebook Pixel, DoubleClick, Hotjar, Segment, Amplitude,
Mixpanel, FullStory, Intercom, LinkedIn Insights, Criteo, and more.
No fake data injection, no promises about being "undetectable," no premium tier. Privacy tools that over claim are security liabilities. This does what it says, nothing more.
PRIVACY
No telemetry. No analytics. No data collection. Everything runs locally in your browser. Source available at codeberg.org/SYNTEX/firefox_privacy_shield.
SUPPORT
Free forever. If it's useful, donations keep development going — button is in
the extension popup.
Works on Firefox desktop and Firefox for Android.
WHAT IT DOES
Tracker Blocking
Blocks outright requests to known analytics and surveillance infrastructure:
Google Analytics, Facebook Pixel, DoubleClick, Hotjar, Segment, Amplitude,
Mixpanel, FullStory, Intercom, LinkedIn Insights, Criteo, and more.
- Fingerprint Header Stripping
- Removes the browser fingerprinting headers sites use to identify you across
- sessions — the entire sec-ch-ua-* family, x-client-data, sec-gpc, and others —
- before they leave your device.
- Traffic Pattern Obfuscation
- Randomizes Accept-Language and Accept-Encoding values and shuffles header order on every request. Disrupts behavioral fingerprinting that tracks you by how your browser talks, not just what it says.
No fake data injection, no promises about being "undetectable," no premium tier. Privacy tools that over claim are security liabilities. This does what it says, nothing more.
PRIVACY
No telemetry. No analytics. No data collection. Everything runs locally in your browser. Source available at codeberg.org/SYNTEX/firefox_privacy_shield.
SUPPORT
Free forever. If it's useful, donations keep development going — button is in
the extension popup.
Works on Firefox desktop and Firefox for Android.
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Permissions and data
Required permissions:
- Access browser tabs
Optional permissions:
- Access your data for all websites
More information
- Add-on Links
- Version
- 4.0.0
- Size
- 42.49 KB
- Last updated
- 15 days ago (Apr 17, 2026)
- Related Categories
- License
- All Rights Reserved
- Version History
- Add to collection
The developer of this extension asks that you help support its continued development by making a small contribution.
Tracker blocking (30 URL patterns) + fingerprint header stripping + request pattern randomization. Data Sovereign.