If an HTTP proxy works properly in the browser but fails in Proxifier, it most likely means that SSL support is unavailable. Many HTTP proxy servers do not support SSL tunneling therefore, they cannot be used as HTTPS. HTTP proxy with SSL tunnel support is also known as: Technical documentation can be found at:
Your applications should then be configured to connect “directly” to the Internet (rather than through proxies). If you were using proxies before you installed Proxifier you should disable any built-in proxy settings. To add a proxy server, click either Proxy Servers in the Profile menu or the corresponding item on the toolbar: