SYNTEX Privacy Shield

Name: SYNTEX Privacy Shield
Author: 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.

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Features & Capabilities

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.

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.

User Growth & Download Statistics

Add-on

By:

SYNTEX Security

Daily users:

Version:

4.0.0 Last updated: 2026-04-17

Version code:

6224559

Creation date:

2025-11-08

Risk:

Permissions:

Host permissions:

<all_urls>

Size:

42.49KB

Email:

co*****@syntexsecurity.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-05

Compare stats and ranking:

Ranking

# 96,866 ▼ 3,132

Other rankings

#180 in data privacy keyword 35 #203 in privacy keyword 54 ▼ 5

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

SYNTEX Security

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/syntex_privacy_shield/

Email:

co*****@syntexsecurity.com

Website:

https://www.syntexsecurity.com

Permission Change History

2026-04-17: Version 3.3.0 → 4.0.0

Add Host permissions: <all_urls>

Add Permissions: activeTab alarms

Remove Permissions: webNavigation <all_urls>

2025-11-26: Version 2.0.0 → 3.3.0

Add Permissions: webNavigation tabs

Remove Permissions: alarms

Is SYNTEX Privacy Shield Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

SYNTEX Privacy Shield requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

SYNTEX Privacy Shield is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****