Shadow AI Firewall

Name: Shadow AI Firewall
Author: Varveroglou Vasileios

Client-side DLP for AI chats: detects sensitive values in what you send, replaces them in outbound requests on supported sites, and shows originals again locally in responses.

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Features & Capabilities

Shadow AI Firewall helps reduce accidental exposure of personal and sensitive data when you use popular AI assistants (ChatGPT, Claude, Gemini, Copilot, Perplexity, and others matched by the add-on).

What it does

Runs only on supported AI websites from the manifest.
Intercepts outgoing requests so payloads are scrubbed before they are sent when the add-on detects patterns you enabled (for example emails, IBANs, payment-card-like numbers, Greek tax/social identifiers, and optional NLP-based masking for names/places).
Keeps a local mapping so replies that reference placeholders can be shown with your original text in the page UI where the add-on applies unmasking.

What it is not

Not a complete enterprise DLP suite; heuristics can miss items or flag false positives.
Does not replace your organization’s security policy or legal review.

Privacy

Default/personal use: settings are stored locally. Optional enterprise mode may send minimal metadata (e.g. scanner type and host class) only if you configure a key; see the privacy policy.

Support Build and source submission notes for reviewers are in the repository README (Mozilla AMO section).

User Growth & Download Statistics

Add-on

By:

Varveroglou Vasileios

Daily users:

Version:

1.0.0 Last updated: 2026-03-30

Version code:

6198137

Creation date:

2026-03-27

Risk:

Permissions:

Host permissions:

*://chat.openai.com/*
*://chatgpt.com/*
*://claude.ai/*
*://*.anthropic.com/*
*://*.openai.com/*
*://gemini.google.com/*
*://bard.google.com/*
*://aistudio.google.com/*
*://*.googleapis.com/*
*://copilot.microsoft.com/*

Content scripts matches:

chat.openai.com
chatgpt.com
claude.ai
*.anthropic.com
gemini.google.com
bard.google.com
aistudio.google.com
copilot.microsoft.com
perplexity.ai
meta.ai

Size:

257.70KB

Email:

va*****@gmail.com

URLs:

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-03

Compare stats and ranking:

Ranking

# 117,097 ▲ 665

For Developers

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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:

Varveroglou Vasileios

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/shadow-ai-firewall/

Email:

va*****@gmail.com

Is Shadow AI Firewall 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.

Shadow AI Firewall requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: openai.com, chatgpt.com, claude.ai, anthropic.com, google.com, microsoft.com, perplexity.ai, meta.ai, x.ai, grok.com, you.com, phind.com, mistral.ai, poe.com, googleapis.com, bing.com, supabase.co
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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.

Shadow AI Firewall is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

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