For Firefox:

In this article I am going to tell you How to bypass a This Connection is Untrusted error. ¬†When you visit a website whose web address starts with https, your communication with the site is encrypted to help ensure your privacy. Before starting the encrypted communication, the website will present Firefox with a “certificate” to identify itself.

The certificate helps Firefox determine whether the site you’re visiting is actually the site that it claims to be. If there is a problem with the certificate, you will see the This Connection Is Untrusted alert page.

Seeing the alert does not necessarily mean that the website you’re visiting is trying to trick you into believing it is a different website – it means that Firefox isn’t able to verify the identity of the website, and that you should proceed carefully.

Bypassing the warning

You should only bypass the warning if you’re confident in both the identity of the website and the integrity of your connection – even if you trust the site, someone could be tampering with your connection. Legitimate public sites will not ask you to add connection rule exceptions – an invalid certificate can be an indication of a web page that will defraud you or steal your identity.

  1. On the warning page, click I Understand the Risks.
  2. Click Add Exception…. The Add Security Exception dialog will appear.
  3. Read the text describing the problems with this site.
  4. Click Confirm Security Exception if you want to trust the site.