You can follow these solutions one by one to see if the problem gets fixed or not. Here are the various solutions for the secure connection failed error which occurs in Firefox when browsing https or SSL sites. Solutions for Secure Connection Failed error in Firefox So here in this post I will tell you the various causes and provide you the solutions or fix for Secure Connection Failed error for Firefox. There are many causes which can lead to “Secure Connection Failed” error in Firefox. It is a very annoying error as it occurs particularly with Mozilla Firefox even though those sites are opening fine in other browsers like Internet Explorer, Google Chrome or Opera. When “Secure Connection Failed” error occurs then you won’t be able to browse all the SSL protected websites or particular SSL websites. It occurs only with websites that uses SSL (Secure Socket Layer) protocol i.e. Secure Connection Failed is a very common error that occurs when browsing internet on Firefox browser.
