Makes YouTube faster, reduces resource usage, fixes UI issues with full compatibility and self-testing
// ==UserScript==
// @name YouTube Performance Booster (Complete Edition)
// @version 3.1
// @description Makes YouTube faster, reduces resource usage, fixes UI issues with full compatibility and self-testing
// @author HYPERR.
// @match *://*.youtube.com/*
// @grant GM_addStyle
// @grant GM_setValue
// @grant GM_getValue
// @run-at document-start
// @license MIT
// @namespace https://greasyfork.org/users/1476487
// ==/UserScript==
(function() {
'use strict';
// ===== COMPLETE CONFIGURATION =====
const settings = {
// Performance Features
instantNavigation: true, // Prefetch pages on hover for instant loading
disableAnimations: true, // Reduce CPU/GPU usage by disabling animations
qualityPreset: 'auto', // Set default video quality
hideShorts: true, // Remove Shorts from homepage
hideComments: false, // Hide comments section
hideSidebar: false, // Hide sidebar recommendations
blockNonEssential: false, // Block non-essential requests
// UI Fixes
fixNotifications: true, // Fix stuck notifications in corner
fixPopups: true, // Fix popup playlist positioning
// Compatibility & Testing
debugMode: true, // Show test results and self-diagnostics
exclude: {
cssModifications: false, // Disable ALL CSS changes (fixes most conflicts)
domObservers: false, // Stop DOM monitoring (if other scripts modify page heavily)
eventListeners: false, // Remove mouseover prefetching (if it interferes with navigation)
qualityControl: false // Let other scripts handle video quality
}
};
// ===== AUTO-TEST SYSTEM =====
const testResults = {
basic: { passed: 0, total: 0, issues: [] },
performance: { passed: 0, total: 0, issues: [] },
ui: { passed: 0, total: 0, issues: [] },
compatibility: { passed: 0, total: 0, issues: [] }
};
function logTest(category, testName, passed, issue = '') {
testResults[category].total++;
if (passed) {
testResults[category].passed++;
if (settings.debugMode) console.log(`✅ ${testName}`);
} else {
testResults[category].issues.push(`${testName}: ${issue}`);
if (settings.debugMode) console.log(`❌ ${testName}: ${issue}`);
}
}
function runComprehensiveTests() {
if (!settings.debugMode) return;
console.log('🔧 YouTube Performance Booster - Running Comprehensive Tests');
// Basic Tests
console.log('\n🧪 BASIC TESTS:');
logTest('basic', 'Script loaded successfully', true);
logTest('basic', 'YouTube environment detected', document.location.href.includes('youtube.com'));
setTimeout(() => {
const videos = document.querySelectorAll('video');
logTest('basic', 'Video elements available', videos.length > 0, 'No videos found on page');
}, 2000);
// Performance Tests
console.log('\n🚀 PERFORMANCE TESTS:');
if (!settings.exclude.cssModifications) {
logTest('performance', 'CSS modifications enabled', true);
if (settings.disableAnimations) {
const animationsDisabled = document.documentElement.hasAttribute('no-animations');
logTest('performance', 'Animations disabled', animationsDisabled, 'Animation CSS not applied');
}
if (settings.hideShorts) {
const shortsHidden = document.documentElement.hasAttribute('hide-shorts');
logTest('performance', 'Shorts hidden', shortsHidden, 'Shorts hiding not working');
}
} else {
logTest('performance', 'CSS modifications disabled (compatibility mode)', true);
}
if (settings.instantNavigation && !settings.exclude.eventListeners) {
logTest('performance', 'Instant navigation active', true);
}
// UI Tests
console.log('\n🎨 UI TESTS:');
if (settings.fixNotifications && !settings.exclude.cssModifications) {
const notificationCSS = document.querySelector('style')?.textContent.includes('ytd-notification-renderer');
logTest('ui', 'Notification fixes applied', notificationCSS, 'Notification CSS missing');
}
if (settings.fixPopups && !settings.exclude.cssModifications) {
const popupCSS = document.querySelector('style')?.textContent.includes('ytd-popup-container');
logTest('ui', 'Popup fixes applied', popupCSS, 'Popup CSS missing');
}
// Compatibility Tests
console.log('\n🔗 COMPATIBILITY TESTS:');
logTest('compatibility', 'DOM access available', typeof document !== 'undefined', 'DOM access blocked');
logTest('compatibility', 'Settings configuration loaded', Object.keys(settings).length > 0, 'Settings failed to load');
// Test exclusion settings
if (settings.exclude.cssModifications) {
const hasCSS = document.querySelector('style')?.textContent.includes('no-animations');
logTest('compatibility', 'CSS modifications properly disabled', !hasCSS, 'CSS still being modified despite exclusion');
}
if (settings.exclude.eventListeners) {
logTest('compatibility', 'Event listeners properly disabled', true);
}
// Show results summary
setTimeout(showTestResults, 3000);
}
function showTestResults() {
if (!settings.debugMode) return;
console.log('\n📊 COMPREHENSIVE TEST RESULTS:');
console.log('================================');
let totalPassed = 0;
let totalTests = 0;
for (const [category, results] of Object.entries(testResults)) {
const percentage = results.total > 0 ? Math.round((results.passed / results.total) * 100) : 0;
console.log(`${category.toUpperCase()}: ${results.passed}/${results.total} (${percentage}%)`);
totalPassed += results.passed;
totalTests += results.total;
if (results.issues.length > 0) {
console.log('Issues found:');
results.issues.forEach(issue => console.log(` - ${issue}`));
}
}
const overallPercentage = totalTests > 0 ? Math.round((totalPassed / totalTests) * 100) : 0;
console.log(`\n🎯 OVERALL: ${totalPassed}/${totalTests} (${overallPercentage}%)`);
// Show intelligent recommendations
console.log('\n💡 INTELLIGENT RECOMMENDATIONS:');
if (testResults.compatibility.issues.length > 0) {
console.log('• If having script conflicts, set cssModifications: true in exclude settings');
console.log('• If experiencing lag, set eventListeners: true in exclude settings');
console.log('• If page is slow, set domObservers: true in exclude settings');
}
if (testResults.performance.passed < testResults.performance.total) {
console.log('• Some performance features not working - YouTube may have updated');
}
if (testResults.ui.issues.length > 0) {
console.log('• UI fixes not applying - try refreshing the page');
}
console.log('\n🔧 COMPATIBILITY MODE:');
console.log('• cssModifications: ' + (settings.exclude.cssModifications ? 'DISABLED (better compatibility)' : 'ENABLED (full features)'));
console.log('• domObservers: ' + (settings.exclude.domObservers ? 'DISABLED (less interference)' : 'ENABLED (automatic fixes)'));
console.log('• eventListeners: ' + (settings.exclude.eventListeners ? 'DISABLED (no lag)' : 'ENABLED (faster navigation)'));
console.log('• qualityControl: ' + (settings.exclude.qualityControl ? 'DISABLED (other scripts handle quality)' : 'ENABLED (automatic quality)'));
console.log('\n⚖️ TRADE-OFF: ' +
(settings.exclude.cssModifications || settings.exclude.domObservers || settings.exclude.eventListeners || settings.exclude.qualityControl ?
'Some features disabled for better compatibility with other scripts' :
'Full performance mode active'));
}
// ===== PERFORMANCE CSS =====
if (!settings.exclude.cssModifications) {
let css = '';
if (settings.disableAnimations) {
css += `
[no-animations] * {
transition: none !important;
animation: none !important;
}
html {
scroll-behavior: auto !important;
}
`;
}
if (settings.hideShorts) {
css += `[hide-shorts] ytd-rich-section-renderer { display: none !important; }`;
}
if (settings.hideComments) {
css += `[hide-comments] ytd-comments { display: none !important; }`;
}
if (settings.hideSidebar) {
css += `[hide-sidebar] ytd-rich-grid-renderer #contents { display: none !important; }`;
}
if (settings.fixNotifications) {
css += `
ytd-notification-renderer,
tp-yt-paper-toast {
position: fixed !important;
top: 20px !important;
right: 20px !important;
z-index: 9999 !important;
}
`;
}
if (settings.fixPopups) {
css += `
ytd-popup-container,
tp-yt-paper-dialog {
position: fixed !important;
top: 50% !important;
left: 50% !important;
transform: translate(-50%, -50%) !important;
z-index: 10000 !important;
}
`;
}
if (css) GM_addStyle(css);
}
// ===== INSTANT NAVIGATION =====
if (settings.instantNavigation && !settings.exclude.eventListeners) {
document.addEventListener('mouseover', function(e) {
const link = e.target.closest('a[href^="/watch"]');
if (link) {
const preload = document.createElement('link');
preload.rel = 'prefetch';
preload.href = link.href;
document.head.appendChild(preload);
}
}, {passive: true});
}
// ===== VIDEO QUALITY CONTROL =====
function optimizePlayer() {
if (settings.exclude.qualityControl) return;
const player = document.querySelector('video');
if (player && settings.qualityPreset !== 'auto') {
player.addEventListener('canplay', function() {
try {
player.setPlaybackQuality(settings.qualityPreset);
} catch(e) { /* Fail silently */ }
});
}
}
// ===== NON-ESSENTIAL REQUEST BLOCKING =====
if (settings.blockNonEssential && !settings.exclude.domObservers) {
const originalFetch = window.fetch;
window.fetch = function(...args) {
const url = args[0];
if (typeof url === 'string' && (
url.includes('/log_event') ||
url.includes('/log_interaction') ||
url.includes('/tracking') ||
url.includes('/beacon/')
)) {
return Promise.reject(new Error('Blocked by YouTube Performance Booster'));
}
return originalFetch.apply(this, args);
};
}
// ===== APPLY SETTINGS =====
if (!settings.exclude.cssModifications) {
if (settings.disableAnimations) document.documentElement.setAttribute('no-animations', '');
if (settings.hideShorts) document.documentElement.setAttribute('hide-shorts', '');
if (settings.hideComments) document.documentElement.setAttribute('hide-comments', '');
if (settings.hideSidebar) document.documentElement.setAttribute('hide-sidebar', '');
}
// ===== INITIALIZATION =====
if (!settings.exclude.domObservers) {
const observer = new MutationObserver(function() {
optimizePlayer();
});
observer.observe(document, {
childList: true,
subtree: true
});
}
window.addEventListener('load', function() {
optimizePlayer();
runComprehensiveTests();
});
})();