As described in the article HTTPS-Only mode is opt in, you can also disable it at will, you can add exceptions on a site-by-site basis, and even when it's on yo

As described in the article HTTPS-Only mode is opt in, you can also disable it at will, you can add exceptions on a site-by-site basis, and even when it's on you are prompted on whether or not you wish to proceed to non-HTTPS sites.