Locker - Password Manager

Name: Locker - Password Manager
Rating: 4.9048 (21 reviews)
Author: CyStack

By: CyStack

A browser extension makes your online presence secure and seamless.

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Features & Capabilities

Locker is a cross-platform vault that help users secure sensitive digital assets such as logins and passwords, secret notes, payment cards, online identities, and crypto wallets. It also offers additional features to enhance browsing experience like password autofill, item sharing, and more.

Why choose Locker over other password managers?

Security

Locker uses military-grade encryption to secure your data. AES-256bit encryption combined with PBKDF2 and RSA algorithm makes your data is un-crackable.
Your vault is encrypted with a Master Password, which is the only key to decrypt your data.

Privacy & Transparency

Your Master Password is only yours. No body, even us, can see your Master Password thanks to Zero-knowledge development model.
Locker is an open-source product. Everyone can inspect its source code. We believe transparency is the key to better security.

Unlimited Sync

Once you add, edit, remove items in your Locker on a device, the data will be sync-ed across all other devices*.

Bring Your Passwords with You

With Offline Mode, you can use Locker anywhere, anytime, even when your phone is not connected to the internet**.

No more password hassle. Free Your Mind. Install Locker.

*Data is encrypted before they left the current device. **Offline Mode is only available on Locker mobile application (Android & iOS).

User Growth & Download Statistics

Add-on

By:

CyStack

Daily users:

Rating:

4.90

(21)

Version:

4.0.55 Last updated: 2026-06-03

Version code:

6289736

Creation date:

2023-03-15

Risk:

Permissions:

Content scripts matches:

Size:

43.38MB

Email:

su*****@locker.io

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-19

Compare stats and ranking:

Ranking

# 20,004 ▼ 375

Other rankings

#102 in password keyword 87 ▼ 3

#168 in payments keyword 24 ▼ 7

#194 in manager keyword 72 ▼ 5

#204 in algorithm keyword 3 ▼ 4

#206 in manage keyword 40 ▼ 2

Upgrade to see more rankings

Other platforms

Locker - Password Manager (v4.0.55)

1,000 4.67

(48)

Locker Password Manager (v2.12)

62,316 4.00

(421)

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:

CyStack

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/locker-password-manager/

Email:

su*****@locker.io

Website:

https://support.locker.io

Permission Change History

2026-02-16: Version 4.0.51 → 4.0.52

Remove Host permissions: http://*/* https://*/*

Add Permissions: http://*/* https://*/*

2026-02-12: Version 3.1.7 → 4.0.51

Add Host permissions: http://*/* https://*/*

Remove Permissions: idle clipboardRead webRequest webRequestBlocking identity http://*/* https://*/*

Remove Optional permissions: nativeMessaging

2025-06-05: Version 2.0.12 → 3.0.2

Remove Permissions: <all_urls>

User Reviews

The most notable points of resilience for this password manager are: the completely open-source feature, which I fully support for safety and transparency. Secondly, the password manager is created by Cystack from public information, the most important cybersecurity company in Vietnam, ensuring that user data is very well protected in the cloud, reducing the chances of a successful attack on its infrastructure. This is also evidenced by its ISO certifications: 9001:2025 and 27001:2022, showing that Locker (Cystack) utilizes the best data protection methods. The third point is the end-to-end, zero-knowledge feature, which is the strongest point of resilience. Data in the vault cannot be read or compromised by anyone, including Locker or its employees. The data remains solely yours, and you are the only one who can access it; passwords and information in Locker are very well protected. Locker strictly complies with GDPR. There is strict AES-256 encryption. Solid cloud infrastructure from a security perspective. Trust and dedication. Information is stored externally. Compatibility across multiple devices and operating systems, so with Locker, you don't have to worry about changing your device. Two ISO certifications that represent the most rigorous security standards.

by Gr*****, 2025-11-24

Me gusta que además de guardar contraseñas también puedes guardar métodos de pago, notas e incluso códigos de autenticación 2FA, aplicación móvil para Android y iOS. Super recomendable, lo único que sugiero es optimizar la velocidad de sincronización, por todo lo demás muy buena extensión.

by Jo*****, 2025-11-19

La extensión es muy agradable, sobre todo me encanta la facilidad de conseguir el inicio de sesión de un usuario cuando tengo muchos usuarios en un mismo portal, ya que al visitar un sitio web me filtra todos los usuarios disponibles para ese sitio web, pero ademas me permite filtrar entre el listado para encontrar más rápido y fácil el usuario que busco, esto no lo he visto en ningún otro gestor de contraseñas (al menos en los que he usado), es lo que más me gusta de Locker, así que NUNCA quiten esta funcionalidad por favor. 😎 Espero que puedan mejorar la velocidad de la extensión, pues a veces se vuelve algo lenta, también hay otros errores menores que pueden ser incómodos, aunque tengo entendido el equipo ya está trabajando en ello.

by Cr*****, 2025-07-23

View all user reviews ›

Is Locker - Password Manager 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.

Locker - Password Manager 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.
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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.

Locker - Password Manager is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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