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!

MasterPassword for Firefox - A Unique Password Generator
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.
Add-on stats
Manifest V3
Weekly download count: 32
Firefox on Android: No
Permissions:
- activeTab
- scripting
- clipboardWrite
- storage
- alarms
- nativeMessaging
Size: 238.13K
URLs: Website ,Privacy policy
Full description: See detailed description
Ranking
Other platforms
Not available on Android
Not available on Edge
User reviews
Pros
- 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
Cons
- 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
User reviews
Thank you for this add-on.
Wish there's an option to review the master password first entered, whether it's correct or not. Or, if there's mismatch or mistyped.
by Irwan, 2023-05-12
Add-on safety
Risk impact
masterpassword for Firefox requires very minimum permissions.
Risk impact analysis details
- High Allows reading and modifying clipboard content, which can be sensitive, posing a moderate privacy risk.
- Medium *********** ************* ******* ********** *** ****** ************* ******* *** **** ** ******* **********
- Low ******* ****** ** *** ********* ********
Risk likelihood
We don't have sufficient data to confidently determine the risk likelihood of masterpassword for Firefox. Use it at your own risk.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details