masterpassword for Firefox

masterpassword for Firefox

Keep different passwords for every site you log into without having to remember anything but a single master password. And without the risk of your getting your password list stolen. MasterPassword is available for all your devices!

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What is masterpassword for Firefox?

MasterPassword for Firefox is an exceptional tool that helps maintain your web security by generating unique passwords for every site you use. All it requires is you to remember only a single master password. Unlike other password managers, it never stores your passwords, hence mitigates the risk of data theft. It also provides seamless compatibility with other password managers while offering an optional storing feature.

Stats date:
Users: 723 ▲ 5
Rating: 4.15 (26)
Version: 3.0.0 (Last updated: 2023-10-12)
Creation date: 2015-02-06
Weekly download count: 42
Firefox on Android: No
Manifest version: 3
  • activeTab
  • scripting
  • clipboardWrite
  • storage
  • alarms
  • nativeMessaging
Size: 238.13K
Risk impact: Low risk impact
Risk likelihood: Moderate risk likelihood

Other platforms

MasterPassword for chrome
MasterPassword for chrome (v3.0.0)
4.71 (34) 2,220
Not available on Edge

One of todays main security challenges on the web is passwords. You typically have to login at many different sites, and remembering a different password for every site is hard. Unfortunately one of the sites you use will sooner or later be hacked, and passwords leaked. If that password is reused on other sites, the hackers will have access to all your accounts. MasterPassword can help. With one master password, a unique one can be generated for each site. When you need to login, this addon will complete the site password for you. And it is impossible to guess the master password from a site password. Read more at The MasterPassword algorithm is standardized. You can find app's for Ios, Android, Windows, Mac and Linux.

One of MasterPasswords strong points is that neither the master or site password is stored anywhere. The site password is rather generated mathematically every time. This is in clear contrast to many other password managers, like Firefox' built in password manager. If your computer or browser is hacked, solutions where the password is stored can give away all your passwords! Similar dangers exists with cloud based solutions.

The MasterPassword addon can of course co exist with other password managers and will stay out of your way until you click the MasterPassword button. If you chose to uninstall the addon, you'll just have to remember the passwords you've generated, or import them into another password manager.

Since passwords in MasterPassword are mathematically generated, it is impossible to import other custom passwords into master password. They would have to be stored on your computer, which defeats MasterPassword's working principle. As such, it is convenient to use the Firefox password manager for such passwords, until you find a time to switch a site to MasterPassword.

Also note that when MasterPassword enters a password for you, Firefox will behave like you typed it on the keyboard, and prompt you if you want to save it. You can of course accept this, but your passwords will then be stored and risk being stolen. I'd therefore suggest to reject that offer.

Protect your accounts on the web - Use MasterPassword

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Ease of use and simplicity
  • Works on different platforms (PC, phone)
  • No need for account creation or synchronization
  • Better performance than similar Chrome extensions
  • Ability to save master password in OS vault
  • Automatic password generation
  • Lack of option to review the entered master password
  • Reported issues with opening the addon
  • Popup appears then closes instantly making it impossible to use
Most mentioned
  • Password generation
  • Saving master password in OS vault
  • Cross platform compatibility
  • Usability
View all user reviews
Risk impact

masterpassword for Firefox is relatively safe to use as it requires very minimum permissions.

Risk likelihood

masterpassword for Firefox is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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