Hermes

Name: Hermes
Author: Omar Criacci

By: Omar Criacci

End-to-end encrypted messaging using ECDH key exchange and AES-GCM encryption. Secure your online conversations.

This add-on was removed from Firefox Add-ons Store on 2026-01-19

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Features & Capabilities

Hermes adds end-to-end encryption to any messaging platforms, including those who already have it, like WhatsApp, Telegram, and Facebook Messenger, using ECDH P-256 key exchange and AES-GCM encryption.

You create a master password that protects your encryption keys. To communicate securely with someone, you exchange public keys. Then you encrypt messages before sending and decrypt messages you receive.

Features

ECDH P-256 key exchange
AES-GCM 256-bit encryption
Local storage with PBKDF2-protected vault (100k iterations)
Profile management for contacts
Clipboard integration
No data collection or external servers
Open source, vanilla JavaScript

Requirements

Both you and your contact need the extension installed to communicate securely. Works with any text-based messaging platform.

All encryption happens locally on your device. Your keys never leave your browser.

User Growth & Download Statistics

Add-on

By:

Omar Criacci

Daily users:

Version:

1.0.0 Last updated: 2026-01-18

Version code:

6122291

Creation date:

2026-01-15

Risk:

Permissions:

Size:

36.03KB

Email:

om*****@gmail.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-01-19

Compare stats and ranking:

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:

Omar Criacci

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/hermes-messanger/

Email:

om*****@gmail.com

Website:

https://github.com/omartrj/hermes-addon

Is Hermes 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.

Hermes requires very minimum permissions.

Risk impact analysis details

High Allows reading and modifying clipboard content, which can be sensitive, posing a moderate privacy risk.

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.

Hermes may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.