If these web sites stop working in Firefox, this can cause Firefox users to switch to another browser. Plenty of web sites still rely on Adobe's Flash Player technology, so they decided to keep it. Mozilla has made an exception only for Adobe Flash. Plugins like Silverlight, Java, Unity (a framework for games) and Linux's Gnome Shell plugin have stopped working. In Firefox 52, the only NPAPI plugin which remains working out-of-the-box is Adobe Flash. One of them was disabling the support for classic NPAPI plugins. Besides this HTTP login warning message, the browser introduced a number of unpopular changes. These steps will restore the behavior of the previous versions of the browser.įirefox 52 was released in March 2017. Set it to true by double clicking it or by right clicking it and choosing Toggle.

In about:config, type in the filter box.Now you need to enable the browser's form auto-filling feature. This will disable the annoying security warning in Firefox. Set it to false by double clicking it or by right clicking it and choosing Toggle. The option security.insecure_field_ will appear in the list.Enter the following text in the filter box:.Open a new tab in Firefox and enter the following text in the address bar: about:configĬonfirm that you will be careful if a warning message appears for you.To disable insecure login prompt in Firefox, you need to set the option, security.insecure_field_ to false. You might want to disable the warning message in this case. If you have to work with many sites which use only the HTTP protocol, this can be extremely annoying. Here is how the message looks:īesides this warning message, it disables the browser's form auto-filling feature. In Firefox 52, when opening a page with a password prompt using the plain HTTP protocol, the browser shows this special warning because HTTPS is more secure and encrypted whereas anyone trying to intercept your HTTP traffic can do so quite easily.

Firefox says insecure connection