Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How do I prevent firefox from automatically filling in usernames and passwords without completely disabling auto-fill?

  • 1 reply
  • 3 have this problem
  • 1 view
  • Last reply by philipp

more options

I'm an active user of form auto-fill, but I recently noticed it adds it automatically on some sites. Meaning it adds it without me doing anything. For an instance, if I go in on a site where I have an account (note: a single one) and log out, the login is automatically added. Trying to figure out whether or not I can disable it leads me to [this](https://support.mozilla.org/en-US/kb/control-whether-firefox-automatically-fills-forms). The problem being I can only disable it completely, meaning it won't remember anything. I want it to remember forms, but not fill it in without me trying to fill it in.

Reproduction is really simple: find a site where you have one account stored in auto-fill (two or more doesn't work; it has to be one) and make sure you're logged out. Go to an applicable login page and the credentials should be added without user interaction.

My question: Is it possible to prevent Firefox from automatically filling the form without user interaction without disabling auto-fill completely?

I'm an active user of form auto-fill, but I recently noticed it adds it automatically on some sites. Meaning it adds it without me doing anything. For an instance, if I go in on a site where I have an account (note: a single one) and log out, the login is automatically added. Trying to figure out whether or not I can disable it leads me to [this](https://support.mozilla.org/en-US/kb/control-whether-firefox-automatically-fills-forms). The problem being I can only disable it completely, meaning it won't remember anything. I want it to remember forms, but not fill it in without me trying to fill it in. Reproduction is really simple: find a site where you have one account stored in auto-fill (two or more doesn't work; it has to be one) and make sure you're logged out. Go to an applicable login page and the credentials should be added without user interaction. My question: Is it possible to prevent Firefox from automatically filling the form without user interaction without disabling auto-fill completely?

Chosen solution

hi, yes you can change it like this: enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named signon.autofillForms. double-click it and change its value to false.

Read this answer in context 👍 1

All Replies (1)

more options

Chosen Solution

hi, yes you can change it like this: enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named signon.autofillForms. double-click it and change its value to false.