Due to the upcoming deprecation of XUL-based add-ons, I am stopping development and support for this add-on. E-mail me if you’d to take over development.

AutoAuth is an extension for Mozilla-based Web browsers that automatically submits HTTP authentication dialogs when you’ve chosen to have the browser save your login information. (If you’ve already told the browser what your username and password are, and you’ve told it to remember that username and password, why not just have it automatically submit it instead of asking you each time?)

If you don’t have a username and password saved for a subdomain (e.g.,, AutoAuth will give you a list of suggestions for that domain, based on other saved usernames and passwords for similar subdomains (e.g., or * Just choose which username to use from the list, and hit the Autofill button:

AutoAuth Firefox extension

Install AutoAuth from Mozilla Add-ons

If you’re having trouble with the extension or would like to see a new feature added, e-mail me at or leave a comment below.

65 thoughts on “AutoAuth

  1. Bob says:

    It worked great in FF4, but it isn’t marked as compatible with FF5. Maybe you just need to update the compatibility listing and do no extra coding?

  2. I’ve fixed the AutoAuth 2.1 addon to work with ANY Thunderbird and Firefox likely till the end of time (99.*):

    If you’d like to know how to do it yourself (how to fix/change addon version compability), or just don’t trust the file I’ve posted (by default, you shouldn’t :P), follow this steps:

    1. Download my file AND download the official file:

    2. Unpack both files (it’s a standard zip archive, you can change the extension if you like, but remember to change it back afterwards)

    3. Compare the content of the install.rdf file in both archives and you’ll know it’s done :D

    Other files are identical.

  3. Stefan says:

    Hi there! Excellent work, I love the plugimn. There is just one issue: When I use your plugin with a page that auto-refreshes via javascript, your plugin doesn’t work. Could you please look into that? CHeers! Stefan

  4. Donna says:

    @Michał Sacharewicz This fix didn’t work for me. Auto auth is not working with FF 3.2.68 and I plan to upgrade but many say it’s definitely broken with FF5. I’m also using ESR FF (for organizations). It seems to be the only thing of it’s kind anywhere. Hope to get a fix.

  5. @Donna:

    1. First of all, current compatibility of this addon has been updated by Mozilla and is now stated to be 3.6 – 12.0a1. It should work Out-of-the-Box with FF5, it’s been definitely working all the way from 5 to 11 for me. Check the addon website, the compatibility complaints in comments ceased at mid-2011:

    2. The fix I gave you should be working perfectly, but in that time I’ve found even better – and universal – solution:

    This Mozilla-made (official) addon disables the compatibility check in both Firefox and Thunderbird (ie. forces both programs to accept and run all addons, regardless of compatibility declarations) and enables user to send feedback to Mozilla about addons compatibility issues. It works perfectly for me and I had no single compatibility issue since July 2011.

    3. The final and best news is that Mozilla realized that old compatibility checks cannot possibly work with current, rapid release cycle. As of FF10, the compatibility mechanism has been reworked and should automatically accept older-but-working addons:

  6. Donna says:

    @Michał Sacharewicz. Thanks for the response, I’ve upgraded to FF11 ( which prompted that I was actually downgrading when I installed it, even though the last version was 3.6.12) and added the compatibility reporter. It still doesn’t work. What am I supposed to see? I have passwords saved by the browser and confirmed this in the settings. I’ve restarted after every addon. I disabled all other plugins. I navigate to http and https login pages, the browser auto inserts my info and ..nothing, the form is not submitted. Btw I can’t tell by lack of consecutive complaints that the plugin is even still enabled for many. I’m on MAC if that helps but I don’t believe there’s a block plus I’m not getting a system message.

  7. Hi,
    Thanks for helping us escaping boring clicking ceremony every morning.

    A proxy password, I used to enter thru AutoAuth, has an available duration. When expiring password duration, AutoAuth automatically send wrong password for authenticator. This cause account locks, (and unhappy process to resume account).

    Can we set a password duration or a date to stop AutoAuth?

  8. Hi Christopher,

    Thanks so much for this great extension. It’s exactly what I need. I’ve been successfully using it for months. I’ve noticed that if you tell it you do NOT want it to memorize a particular website then there is not way to tell it you DO want it to memorize passwords for that same website at a LATER date. I guess I could delete and then re-install the add-on to “clear” the preferences but it would be nice to always have an option to memorize passwords for sites that you have previously told httpauth to not memorize passwords for.

    Thanks again.

  9. Patrick says:

    Quick question. I installed AutoAuth on my work computer and it was working perfectly – until I had to change my Windows password per corporate policy. Now when I attempt to navigate to our intranet home page, I have to authenticate again. AutoAuth seems to be remembering my OLD password – and even after multiple attempts to enter the new one, it doesn’t seem to get updated the next time I launch FF and navigate to our intranet home page. Can you help? Thanks!

  10. AutoAuth is brilliant, can’t fault it. I’ve used in several kiosk/digital signage applications without a problem at all. The only times AutoAuth hasn’t worked was when the code of the site specified ‘autocomplete=”off”‘ and who can argue with that! Thank you for a great plugin.

  11. Mark says:

    Nice Addon, thank you.
    Might it be possible to run the process in the background? Actually Firefox switches every time to the tab where the password is asked and makes this the active although I’m working in another tab.
    Thank you and cheers,

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