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How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

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Grand Master

How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

I never save passwords - never have, never will. Using evil IE, Gmail works correctly in that it prompts me for ID and password for each new browser instance. Yet when I open gmail with FF, it goes straight to my inbox without prompting for ID or password. I use gmail in "always secure" mode. Cookies are enabled, of course, just did not expect my password to be saved and loaded from a cookie. How can I rectify this problem?

This happened

Every time Firefox opened

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Shooting Star

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

Hello Shrek.

First, let's clear things up: when you save a password in Firefox, it's stored in your computer, and isn't shared or uploaded to anywhere. It's also encrypted so only Firefox can read it (i.e. use it to auto complete passwords), and keep it away from the prying eyes of malware, viruses and whatnot. Saving your password to Firefox is completely safe and that password will only be available to someone who users your Firefox profile. If you want to have different Firefox profiles for different users, please read this article.

On the other hand, when you ask a site to "log you in automatically", it has absolutely nothing to do with Firefox's password manager. When you ask a site to always log you in, the sites stores a cookie in your browser (in this case, Firefox, and not other browsers you may have installed or Firefox in other computers - unless you have them synced with Firefox Sync) that the site will use each time you visit it to know whether your logged in or not. This cookie is exactly the same kind of technology a site uses to know if you're logged in at all. Without cookies (i.e., if you have cookies disabled), you'll need to be constantly logging in, because the site won't be able to remember that you already did log in. This renders most, if not all, sites that require you to log in completely useless.

If you don't want to be always logged in in a given site, simply don't ask it to always log you in. You may need to log out and log in again to tell him that, but that's an usability issue with the site, not with Firefox.

15 REPLIES
Shooting Star

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

Hello Shrek.

First, let's clear things up: when you save a password in Firefox, it's stored in your computer, and isn't shared or uploaded to anywhere. It's also encrypted so only Firefox can read it (i.e. use it to auto complete passwords), and keep it away from the prying eyes of malware, viruses and whatnot. Saving your password to Firefox is completely safe and that password will only be available to someone who users your Firefox profile. If you want to have different Firefox profiles for different users, please read this article.

On the other hand, when you ask a site to "log you in automatically", it has absolutely nothing to do with Firefox's password manager. When you ask a site to always log you in, the sites stores a cookie in your browser (in this case, Firefox, and not other browsers you may have installed or Firefox in other computers - unless you have them synced with Firefox Sync) that the site will use each time you visit it to know whether your logged in or not. This cookie is exactly the same kind of technology a site uses to know if you're logged in at all. Without cookies (i.e., if you have cookies disabled), you'll need to be constantly logging in, because the site won't be able to remember that you already did log in. This renders most, if not all, sites that require you to log in completely useless.

If you don't want to be always logged in in a given site, simply don't ask it to always log you in. You may need to log out and log in again to tell him that, but that's an usability issue with the site, not with Firefox.

New User

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

just google it. a lot of password recovery tool support Windows OS. http://password-genius.com

New User

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

I have this issue too. I have never asked to be "always signed in" with gmail, yet sometimes it will sign me in automatically when I open my Firefox browser. I try clearing everything I can clear ( even though I've said NOT to save my password or sign in automatically), but it still happens. It's not even consistent - sometimes it will happen and sometimes not. This is very frustrating. I share my computer and I do not want automatic sign in anytime! >Smiley Surprised(

Site Moderator

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

The Gmail login page has a check box to remember you.

Websites remembering you and automatically log you in is stored in a cookie.

Clearing the cookies from those websites should log you out and prevent further automatic login.

Tools > Options > Privacy > Cookies: "Show Cookies"


A way to see which cookies a website has stored is to click the favicon (Site Identification icon) on the left end of the location bar.

  • Click the "More Information" button to go to the Security tab in the "Tools > Page Info" window.
  • Click the "View Cookies" button to open the Cookie Manager and see which cookies that domain has stored.
New User

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

Hello Morbus,

I have just the opposite problem. I want to automatically taken into Gmail when I turn on my PC and click Gmail. I don't want to have to sign in. Right or wrong, I want to make my wife happy. So, how do I do this?

Site Moderator

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

  • Websites remembering you and automatically log you in is stored in a cookie.
  • You need an allow cookie exception (Tools > Options > Privacy > Cookies: Exceptions) to keep that cookie, especially for secure websites and if you let cookies expire when Firefox closes
  • Make sure that you do not use Delete browsing, search and download history on Firefox to clear the "Cookies" and the "Site Preferences"

See also http://kb.mozillazine.org/Cookies

New User

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

I have a different problem. I have a facebook account. so does my wife and two sons. Every time I go to facebook it will log me in automatically. When my wife or sons go to facebook it will log them onto my account automatically. They log out of my account and before they can log into their account it has logged back into my account again. This goes on until they can type fast enough to beat the auto login for my account, which is about 4 seconds. This is annoying. How can I correct this problem?

Site Moderator

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

Did you try to clear the Facebook cookies?
See also http://kb.mozillazine.org/Websites_report_cookies_are_disabled (Other Solutions)

You should create separate Firefox profiles for each of you to prevent such problems.

Create a new profile for each of you and create a desktop shortcut with -P "profile" appended to the target to launch each profile.

New User

Re: How do I prevent auto-login? I never EVER save passwords, yet FF logs me into gmail without prompting for login.

Unable to create multiple profiles, firefox keeps crashing when I run "firefox -P". (image below) using firefox 3.6.13 Windows 7, 64 bit

2011-01-12-20-10-15-626afa.jpg