Your passwords are showing…

Share this article

A lot of geeks and developers out there are using Mozilla Firefox. It’s a fantastic browser, and I highly recommend it. Firefox has been a huge factor in the progress of web development. Where would we be without the Web Developer Toolbar and Firebug?

However, there’s one place you have to be careful using Firefox – password management. You know the little “Remember Password” button you click when you log in? Turns out Firefox doesn’t mind showing you the passwords you’ve saved, in plain text. It’s no secret – others have previously blogged about it – but it does bear repeating. This is the default behaviour, so if you haven’t already spotted this, then chances are it applies to you right now. That means someone unscrupulous can come along and read your passwords. Like this:

First, go into “Preferences” in Firefox (on a mac, hit Cmd-,) and head to the Security tab. Then click the Saved Passwords button as shown here:

Security window in Firefox

This will bring up a Passwords window. I’m not showing you mine. But look for this button at the bottom right:

Show Saved Passwords button

Press this button. Voila! All your passwords are shown, in plain text, on-screen. Please note, my password is not hunter2.

This means that someone can open up Firefox on your computer, and view all your saved passwords. The way to change this is to set a master password for Firefox. Close that passwords window, and go back to the Security preferences pane. There, you’ll see an option for “Use a master password”.

This means that Firefox protects all your saved passwords with a master password which is never shown. However, get used to seeing this prompt…

Master Password prompt

because it comes up ALL the time when you’re using password-authenticated sites. Personally, I use Webkit nightly builds for everyday browsing: they’re extremely fast and stable.

Free Workshops

Watch one of our expert, full-length teaching videos. Choose from HTML, CSS or WordPress.

Start Learning


Our mission is to bring affordable Technology education to people everywhere, in order to help them achieve their dreams and change the world.


0 comments on “Your passwords are showing…

  1. If only Firefox let me require the master password only for revealing my password list instead of every single time I want to use a saved one…

  2. I’d be less worried that someone could see my password in plain view within the ‘Saved Passwords’ dialog of the Security tab in the Preferences pane of Firefox than them actually sitting at my computer with direct access to said “secure” website!!

    I’ve never understood the need to save a password in the browser.

  3. It doesn’t require the master password each and everytime you use one. It asks for it just once per instance run of FF.

    @ceejayoz If it asked the master password to reveal the list, but not when you use them. Then the password would need to be stored in clear on your disk and would be pretty easy to retrieve.

  4. @James: That says “CMD-,” which means the CMD key and the comma key :)

    @Sam – good point! I guess saving passwords should be reserved for less-crucial sites.

  5. First time poster long time follower. Thanks for the great tip and taking the extra effort to put this post together. Keep up the good work!

  6. because it comes up ALL the time when you’re using password-authenticated sites.

    Seconding jfno above, it shouldn’t be coming up all the time. It typically appears once when your browser is freshly loaded. Perhaps you use Cmd+Q a lot instead of keeping your browser in memory all the time?

  7. If you’re in an environment where you’re this concerned about someone sitting down at your computer and stealing your passwords there are a few things to consider:

    1. It’s probably time to have a discussion with this person who you think will be stealing passwords.
    2. If you don’t know the person and are just careless enough to leave your computer open, chances are the person who wants to steal your passwords knows a better way and can get around this system (I can think of plenty of apps and methods to steal passwords that are in fact more efficient and faster than this method).

    What situation would this be useful in? This is like a prescription drug, it just cures the symptom. In reality, we should be trying to get people less reliant on their computer remembering their passwords and not writing them down on little sticky notes that are posted on their monitors.

  8. Hey @Luke, thanks for your comment – there’s actually two backgrounds shown there,

    Elevation by coffeelover,

    and Lazy Days li by boss019,

    Check out the other wallpapers InterfaceLIFT – I downloaded a whole bunch of their desktop backgrounds and set them to shuffle.

    @Tyler – you’re absolutely right, password security is very important. However for less-important passwords, like forum log-in details, this method of remembering passwords comes in handy. People will use the feature because it’s readily available, so it’s best that they know what they’re using.

    @Peter Cooper and @jfno, you’re right, thanks :)