NGUMU: Website Blocker & Focus Timer by kileleni

Stay focused in Firefox with NGUMU, a website blocker and focus timer for work, study and healthier screen time. Block distracting websites, set recurring schedules, pause before opening time-wasting sites, and track your progress.

Focus timer: Choose Pomodoro 25/5, 52/17, 90/20 or 20/20/20, or create a custom focus session.

Website blocker: Maintain a personal blocklist, use scheduled blocking, and keep distracting sites out of reach during focus sessions.

Mindful pause: Add a short decision moment before a distracting site opens, with a countdown and motivational prompts.

YouTube Shorts and Instagram Reels: Hide short-form feeds when those controls are enabled.

Fullscreen breaks: Use built-in eye-health reminders to step away, stretch and rest.

Tab tools and analytics: Organize tabs, review focus history, see day streaks and active days, and understand your completed sessions.

Optional protection lock: Add extra friction before changing your blocking rules.

Includes a 40-day Pro trial. The basic timer stays free after the trial; Pro features require paid access.