Disable Insecure Login Field Warning in Firefox

As it almost always does, the new version of Mozilla Firefox web browser – version 52.0 has brought new features. Some of these features are added to enhance the security provided by Firefox browser. For example, now if you try to login to an insecure web site (a web site accessible only over HTTP) then Firefox shows you a warning that reads – “This connection is not secure. Logins entered here could be compromised.” While this warning serves the purpose for the times when you are unaware of that fact whether you are entering login credentials on a secure or an insecure web page, this warning is just a nuisance when you have to login to an insecure website regularly.

Firefox Insecure Login Warning

In the latter case, if you want to get rid of this warning then you can follow these simple steps:

  1. In the Firefox web browser, type about:config in the address bar and press Enter.
  2. A warning will appear in Firefox. Click on the I accept the risk! button to proceed.Firefox Insecure Login Warning
  3. Look for the preference named security.insecure_field_warning.contextual.enabled. Double-click on it to change its value to false.
  4. Look for the preference named signon.autofillForms.http. Double-click on it to change its value to true.Firefox Insecure Login Warning
  5. This is it. From now on, you won’t see the insecure login warning in Firefox anymore.

Even though Firefox insecure login warning can be easily disabled using these steps, it is better to keep this warning enabled. It could be very useful and protect you from entering your login credentials on phishing sites as most of these phishing sites do not use any SSL certificates and have insecure connections. And even in the case of legitimate insecure websites, your login credentials can be subjected to data sniffing attacks. In these cases, you can use an encrypted VPN service like  F-Secure Freedom and Avira Phantom VPN.


  1. Ugh.
    Which 1 of the 2 do we need to *ONLY* disabled the popup.
    This article was supposed to be about that.
    Why the “also disable this addition stuff too”????

  2. Hi, maybe someone still reads this:
    If I disable “insecure_field_warning.contextual.enabled” the warning is not displayed any longer, but I still need to click into the username field and select my username. Before this change in Firefox, my username and password were already filled in and I could log in directly. Is there any way to restore this behavior?

  3. Thank you! Very simple instructions and straight to the point. We need more of your work in this world! We don’t need a 2 minute long YouTube introduction or eight paragraphs of text before disabling something so simple, and that’s the usual it seems. Thanks again.

  4. Thank you! This was driving me insane. I always forget about the about:config settings. I’ve just about had it with Firefox anyway. Close to pulling the trigger and switching back to Chrome.

    1. Switch to Pale Moon instead. It’s basically Firefox before it became bloated and unusable.

  5. There should have been a box to tick which said do not warn me about this site again. There isn’t so I had to disable it.

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