Cyber Threat Coalition (CTC) is a trusted information resource and best practice resource for the cybersecurity community. The organization provides security professionals with the necessary information to protect their businesses and their users from attacks and intrusions.

The organization takes a zero tolerance approach and does not let its members (known as "membership") host websites which are flagged as malicious. A website which is marked as malicious by the organization, even if it is actually safe, will automatically be blocked and a warning message will be displayed on the screen of the user.

This extension simply ensures that a user will be informed before entering a website that is marked as malicious by the organization. In other words, it informs the user of the possibility of there being a malicious website and that it is advisable to not share any data with it.