LeechBlock NG

Overview

LeechBlock NG (Next Generation) is a free, open-source browser extension that helps users stay productive by blocking access to time-wasting websites. It offers one of the most flexible and customizable website blocking systems available, with support for complex rules and schedules that can adapt to different work patterns and needs.

Key Features

Advanced Blocking Rules

• 30 Block Sets: Create up to 30 different groups of websites with unique blocking rules
• Time-Based Blocking: Block sites during specific times of day or days of the week
• Time Limits: Set daily time allowances for specific sites before they get blocked
• Keyword Filtering: Block sites based on keywords in URLs or page content
• Content Type Blocking: Restrict access based on content types (images, videos, etc.)

Scheduling & Customization

• Workday vs. Weekend Rules: Different blocking schedules for workdays and weekends
• Custom Time Periods: Define precise blocking windows (e.g., 9 AM - 5 PM)
• Cooldown Periods: Force waiting periods before allowing access again
• Access Windows: Allow brief access windows for checking important information

Security Features

• Password Protection: Prevent yourself from changing settings during work hours
• Access Codes: Require typing random access codes to unblock sites temporarily
• Lockdown Mode: Extra-strong protection against bypassing the blocker
• Delayed Activation: Set rules that can't be changed for a specified period

Motivational Elements

• Custom Block Pages: Redirect to motivational quotes or custom messages
• Statistics Tracking: View how often you attempt to access blocked sites
• Warning Messages: Display custom warnings before blocking kicks in

Browser Support

• Google Chrome
• Microsoft Edge
• Mozilla Firefox
• Opera
• Brave
• Other Chromium-based browsers

Use Cases

• Students: Block social media and entertainment sites during study hours
• Remote Workers: Maintain focus during work hours by blocking distractions
• Writers & Creators: Eliminate interruptions during creative work sessions
• People with ADHD: Reduce temptation to switch tasks or get distracted
• Anyone Building Better Habits: Support behavior change through environmental design

Advantages Over Competitors

vs. StayFocusd

• More granular control with 30 block sets vs. StayFocusd's simpler approach
• Better scheduling options with time-of-day and keyword-based rules
• Cross-browser support (StayFocusd is Chrome-only)

vs. BlockSite

• Completely free with no premium features locked behind paywall
• More powerful rule customization for advanced users
• Open-source and privacy-focused

Ideal For

• Power users who want maximum control and customization
• People who need different rules for different contexts (work/personal)
• Those who prefer free, open-source solutions
• Users who need cross-browser compatibility
• People serious about eliminating digital distractions

Configuration Examples

Example 1: Student Schedule

• Block Set 1: Social media blocked 8 AM - 6 PM on weekdays
• Block Set 2: Gaming sites blocked entirely during exam weeks
• Block Set 3: News sites limited to 15 minutes per day

Example 2: Remote Worker

• Block Set 1: Shopping sites blocked during core work hours (9 AM - 5 PM)
• Block Set 2: Social media allowed 10 minutes every 2 hours
• Block Set 3: Entertainment sites completely blocked on deadline days

Pricing

Free and open-source. No premium tiers or hidden costs.

Limitations

• Complex interface may overwhelm users wanting simple blocking
• Requires initial setup time to configure rules properly
• Browser-level blocking only (can't block native apps)
• Determined users can disable extensions (though password protection helps)