Curbox Browser Extension

The open-source screen-time browser extension for Chrome, Brave, and Firefox. It tracks how long you actually spend on sites (counting only active viewing time), blocks sites in groups with usage-based, time-based, or per-visit rules, and uses keyword and pattern matching to block feeds like Reels or Shorts while leaving the rest of a site usable. When you reach a blocked page it shows a customizable breathing warning screen with no-unlock, effort-based, or timer-based options. Built with WXT, React, and TypeScript.