Nay! is a Chrome extension that allows users to block URLs on their blacklist, preventing access to specific websites. Users can add rules along with reasons for blocking, and when a matching link is detected, an angry emoji is prepended to the text content. Clicking on blocked links triggers a prompt displaying the reason for the blockage, providing users with a reminder of why the URL was blacklisted. The extension also tracks and displays the number of blocked links on each tab and can block dynamically added links after the initial page load. Nay! aims to help users avoid websites with dark patterns, GDPR pop-ups, privacy concerns, or other forms of abuse.