CheckMyHTTPS is a tool that lets you check the authenticity of a website. Using this extension, you can check the validity of a website's SSL certificate and identify if the site is secure or not.

This tool can be used to protect yourself against the following attacks:

If you are on a public Wi-Fi network, you may end up connecting to a rogue access point that is pretending to be the secure connection you are expecting. In this case, you may end up giving away your privacy and exposing yourself to man-in-the-middle attacks.

A malicious website may use a fake certificate to impersonate a secure connection. To protect yourself, make sure you only connect to a website that you trust.

A website may be protected by an out-of-band firewall, but this may not protect you from an in-band attack. In this case, the hacker can get to the server and change the content of the website before your eyes.