Password Leak Monitor

An addon for automatically and securely checking used passwords against known leaked passwords

Password Leak Monitor: Securely check passwords against known breaches

Password Leak Monitor is a secure Firefox add-on that automatically checks passwords used against known leaked passwords. It utilizes the haveibeenpwned API and the k-Anonymity model to ensure that your passwords are never transmitted to any other system.

Add-on stats

Users: 58
-3
Rating: 4.00
(4)
Version: 2.1.8 (Last updated: 2020-05-03)
Creation date: 2019-05-11
Weekly download count: NaN
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood:
Manifest version: 2
Permissions:
  • tabs
  • contextMenus
  • storage
  • notifications
  • <all_urls>
Size: 764.93K

Other platforms

Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary

A browser addon that automatically monitors all passwords used and alerts you if it has been included in any data breaches.

How is this safe?

Your passwords are NEVER transmitted to any other system. This addon makes use of the haveibeenpwned API, which implements a k-Anonymity Model so your password can be checked without ever having to give your password to any other party.

How does it work?

It's a fairly simple extension: for every password you enter, a call is made to Have I Been Pwned with the first five characters of your hashed password. A list of potential matches is returned, and the addon determines if your hashed password matches any of the compromised hashes.

Add-on safety

Risk impact

Password Leak Monitor requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk likelihood

Password Leak Monitor has earned a fairly good reputation and likely can be trusted.

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