How To Disable Firefox Insecure Form Warning

Keep in mind that your password can very easily be stolen if you are logging into websites over HTTP. If a website you use does not offer secure logins, use a unique password for that site and do not use it anywhere else.

Only follow these instructions if you want to turn off these important security settings in Firefox. Do not follow these instructions if someone else is telling you to.

Here’s how to disable Firefox insecure password warnings:

• Open a new tab, paste about:config into the address bar and hit enter.
• If you see the “This Might Void Your Warranty” page, click the blue “I accept the risk!” button. Understand we are manually modifying Firefox’s default settings.
• In the Search box at the top, paste "security.insecure_field_warning.contextual.enabled"
• Double click the setting to change it to "false", to disable Firefox’s insecure password warning.
• Done! Now when you visit pages with HTTP login forms, the warning will no longer appear.

 
If you also want to restore autofill functionality, so that your saved login/password automatically populates in an HTTP form, keep the configuration page open and follow the next step.

Optional. In the Search Box on the about:config page, paste signon.autofillForms.http

Double click the setting to change it to “true,” this will enable autofill.