parenting

Your Kid Sneaking Online Games Again? Try This Anti-Addiction Tool

Honghao Wang

25 Oct 2025 — 3 min read

A Different Kind of Teenager — Chrome Anti-Addiction Extension

Date: 2025-10-25 08:58

Location: Chongqing

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Click to follow the public account — technical tips delivered promptly!

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> ❝

> Write a bit of code, and your gaming headaches disappear.

> Got a "little beast" at home obsessed with casual mini-games?

> Last Saturday, I was watching dramas when a relative called:

> “Help! My kid is glued to mini-games, ignores homework, won’t eat — it’s like they’re possessed!”

> Sounds like a typical case of “7k7k / 4399 syndrome.”

> So I spent ten minutes building a Chrome extension: it blocks gaming sites outside allowed hours — no more constant monitoring.

> ❞

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🎯 Goal: Auto Block Games Outside Allowed Hours

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Needs Analysis — What Parents Want

After a long chat with my relative, the key requirements were:

Targeted Blocking: Restrict addictive online mini-game sites only
Time Management: Allow limited playing hours (e.g., 8–9 PM)
Friendly Reminder: Explain block reason rather than show an error page

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Code Implementation — Love in Every Line ❤️

Project Structure

anti-addiction
├── manifest.json      # Extension “ID card”
└── background.js      # Logic: time checks and blocking

File Roles

manifest.json — Defines extension details and permissions
background.js — Determines time limits & intercepts specific sites

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🚀 GitHub Source Code

Full code: https://github.com/Teernage/anti-addiction--extension
Like it? Give a Star ⭐
Find a bug? Open an issue — I’ll fix it quickly.

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Step-by-Step Implementation

Step 1 — Create Project Files

Create folder: `anti-addiction`
Create file: `manifest.json`

{
  "manifest_version": 3,
  "name": "Anti-Addiction Game Blocker",
  "version": "0.1.0",
  "description": "Anti-addiction game interceptor, blocks game loading from sites like 7k7k and 4399.",
  "permissions": ["scripting", "tabs", "webNavigation"],
  "host_permissions": ["*://*/*"],
  "background": {
    "service_worker": "background.js"
  },
  "action": {
    "default_title": "Anti-Addiction"
  }
}

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background.js — Core Logic

// Blocked domains
const BLOCKED_DOMAINS = ['7k7k.com', '4399.com'];

// Allowed hours: 20:00 - 21:00
const ALLOWED_TIME_RANGE = [20, 21];

Key Parameters

BLOCKED_DOMAINS — List of sites to restrict
ALLOWED_TIME_RANGE — Permitted gaming hours (24-hour format)

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Domain Check & Page Injection

function isBlockedUrl(urlString) {
  try {
    const { hostname } = new URL(urlString);
    return BLOCKED_DOMAINS.some(
      (domain) => hostname === domain || hostname.endsWith(`.${domain}`)
    );
  } catch (_) {
    return false;
  }
}

function injectBlockPage(tabId) {
  if (isInAllowedTime()) return;
  chrome.scripting.executeScript({
    target: { tabId },
    func: injectBlockPageContent,
    args: [ALLOWED_TIME_RANGE],
  }).catch((err) => console.warn('Inject failed:', err));
}

chrome.webNavigation.onCommitted.addListener(({ tabId, url, frameId }) => {
  if (frameId !== 0) return;
  if (isBlockedUrl(url)) injectBlockPage(tabId);
});

function isInAllowedTime() {
  const now = new Date(), hours = now.getHours();
  return hours >= ALLOWED_TIME_RANGE[0] && hours < ALLOWED_TIME_RANGE[1];
}

function injectBlockPageContent(timeRange) {
  try { window.stop(); } catch (e) { console.warn(e); }
  const blockHtml = `
    
    
      
        Anti-Addiction Reminder
        
          body { background:#0f172a; color:#e2e8f0; text-align:center; padding:50px; font-family:Arial; }
          .container { max-width:520px; margin:auto; background:rgba(30,41,59,0.8); padding:20px; border-radius:12px; }
          h1 { font-size:28px; color:#60a5fa; margin-bottom:20px; }
          p { font-size:18px; line-height:1.6; }
        
      
      
        
          🎮 Anti-Addiction Reminder
          Not in allowed gaming hours.Play between ${timeRange[0]}:00 and ${timeRange[1]}:00 only.
        
      
    `;
  document.open(); document.write(blockHtml); document.close();
}

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Step 2 — Install Extension

Open `chrome://extensions/` in Chrome
Enable Developer Mode (top-right)
Click Load unpacked extension
Select your project folder
Installation complete 🎉

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Step 3 — Test

Open 7k7k.com or 4399.com.

If outside 8–9 PM, you’ll see the friendly blocking page:

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Personalization

Add More Sites

const BLOCKED_DOMAINS = ['7k7k.com', '4399.com', 'example.com'];

Change Allowed Hours

const ALLOWED_TIME_RANGE = [19, 21]; // 7–9 PM

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Technical Highlights

Lightweight: ~100 lines of code, only 2 files
Smart: Detects target domains & enforces time windows
UX-Friendly: Gentle explanations instead of abrupt errors

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Conclusion

A 10-minute build can tackle serious parenting challenges with minimal technical overhead.

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