Greasy Fork is available in English.
Press Alt + X to start auto-scroll or increase speed. X to pause/resume, Space / Esc to stop. Use Up/Down to adjust speed. Page Up/Down work normally during scroll/pause. Mouse Up/Down pauses during scroll and work normally during pause.
// ==UserScript==
// @name Universal Auto Scroll
// @version 4.0
// @namespace MedX-AA
// @author MedX
// @license MIT
// @description Press Alt + X to start auto-scroll or increase speed. X to pause/resume, Space / Esc to stop. Use Up/Down to adjust speed. Page Up/Down work normally during scroll/pause. Mouse Up/Down pauses during scroll and work normally during pause.
// @icon data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAABGUlEQVR4nO3VsS4EURQG4E9oRCEh0ZDQi3gDjV7lHXTeAYVo9gl0ahregEapoKEh0SFRbVbIyiSjEYnd2TtzZ5PzJSeZYjbzn/2LQwghlSN8oP/PFO8caqHeAOF/pni3dfpDTuvEArlFA7lFA7lFA7lFA7lFA7lFA7lFA7lFA7m1uoE9dCuErDrd8pvJvDYYvl/OS8oFOhkW6KRcYBKnDYY/x5TEpnHZQPhrzKjJLG5qDH+LOTVbxGMN4Z+xrCGreEsY/h3rGraR6Db0sCmTLXyOEP4L2zLbGWGBXS1xUCH8vhaZwPEQ4U/K37RKca3PBgh/UceVTXmtr3Jd2VTmcfdH+HssGBNLePp1ZVeMmTU8lP988RxCkN43yek7CExEuggAAAAASUVORK5CYII=
// @grant none
// @include *
// @exclude *://*.facebook.com/*
// @exclude *://*.messenger.com/*
// @exclude *://*.instagram.com/*
// @exclude *://*.youtube.com/embed/*
// @exclude *://*.tiktok.com/*
// @exclude *://*.netflix.com/*
// @exclude *://*.hulu.com/*
// @exclude *://*.disneyplus.com/*
// @exclude *://*.primevideo.com/*
// @exclude *://*.spotify.com/*
// @exclude *://music.youtube.com/*
// @exclude *://*.twitch.tv/*
// @exclude *://*.google.com/maps*
// @exclude *://*.docs.google.com/*
// @exclude *://*.drive.google.com/*
// @exclude *://*.mail.google.com/*
// @exclude *://*.outlook.live.com/*
// @exclude *://*.teams.microsoft.com/*
// @exclude *://*.web.whatsapp.com/*
// @exclude *://*.slack.com/*
// @exclude *://*.figma.com/*
// @exclude *://*.canva.com/*
// @exclude *://*.photos.google.com/*
// @exclude *.pdf
// ==/UserScript==
// === CONFIGURATION ===
const INITIAL_SPEED = 30;
const SPEED_MULTIPLIER = 2.0;
const SLOWDOWN_MULTIPLIER = 0.5;
const START_KEY = 88; // Alt + X
const PAUSE_KEY = 88; // X
const STOP_KEYS = new Set([27, 32]);
const SCROLL_DOWN_KEYS = new Set([40]);
const SCROLL_UP_KEYS = new Set([38]);
const PAGE_KEYS = new Set([33, 34]);
let isScrolling = false, isPaused = false, scrollSpeed = 0, lastUpdateTime, realY;
const scrollElement = document.scrollingElement || document.documentElement;
let hudTimeout;
// === HUD ===
const hud = Object.assign(document.createElement("div"), {
style: `position:fixed; bottom:10px; right:10px; padding:5px 10px; background:rgba(0,0,0,0.7);
color:#fff; font-size:14px; font-family:Arial; border-radius:5px; z-index:9999; display:none`
});
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', () => document.body.appendChild(hud));
} else {
document.body.appendChild(hud);
}
// === KEYDOWN HANDLER ===
window.addEventListener('keydown', (e) => {
if (e.ctrlKey || e.shiftKey) return;
// Avoid interfering with input fields or editable elements
const el = e.target;
if (el && (el.isContentEditable || /^(input|textarea|select)$/i.test(el.tagName))) return;
if (e.keyCode === START_KEY && e.altKey) {
e.preventDefault();
isScrolling ? changeSpeed(SPEED_MULTIPLIER) : startScrolling();
} else if (isScrolling) {
if (e.keyCode === PAUSE_KEY) {
e.preventDefault();
togglePause();
} else if (STOP_KEYS.has(e.keyCode)) {
e.preventDefault();
stopScrolling();
} else if (SCROLL_DOWN_KEYS.has(e.keyCode)) {
e.preventDefault();
changeSpeed(SPEED_MULTIPLIER);
} else if (SCROLL_UP_KEYS.has(e.keyCode)) {
e.preventDefault();
changeSpeed(SLOWDOWN_MULTIPLIER);
} else if (PAGE_KEYS.has(e.keyCode)) {
realY = scrollElement.scrollTop;
}
} else if (isPaused) {
if (PAGE_KEYS.has(e.keyCode) || SCROLL_DOWN_KEYS.has(e.keyCode) || SCROLL_UP_KEYS.has(e.keyCode)) {
realY = scrollElement.scrollTop;
} else if (e.keyCode === PAUSE_KEY) {
togglePause();
} else if (STOP_KEYS.has(e.keyCode)) {
e.preventDefault();
stopScrolling();
}
}
}, false);
// === WHEEL HANDLER ===
window.addEventListener('wheel', (e) => {
if (isScrolling) {
e.preventDefault();
isPaused = true;
updateHUD();
} else {
realY = scrollElement.scrollTop;
}
}, { passive: false });
// === SCROLL TRACKING ===
window.addEventListener('scroll', () => {
if (isPaused || isScrolling) {
realY = scrollElement.scrollTop;
}
}, { passive: true });
// === PAUSE / RESUME ===
const togglePause = () => {
isPaused = !isPaused;
updateHUD();
if (!isPaused) {
lastUpdateTime = performance.now();
requestAnimationFrame(scrollLoop);
}
};
// === SPEED CHANGE ===
const changeSpeed = (multiplier) => {
scrollSpeed = Math.max(5, scrollSpeed * multiplier);
updateHUD();
};
// === START ===
const startScrolling = () => {
isScrolling = true;
isPaused = false;
scrollSpeed = INITIAL_SPEED;
realY = scrollElement.scrollTop;
lastUpdateTime = performance.now();
updateHUD();
requestAnimationFrame(scrollLoop);
};
// === STOP ===
const stopScrolling = () => {
isScrolling = isPaused = false;
scrollSpeed = 0;
hud.style.display = "none";
};
// === SCROLL LOOP ===
const scrollLoop = (timestamp) => {
if (!isScrolling || isPaused) return;
realY += (scrollSpeed * (timestamp - lastUpdateTime)) / 1000;
scrollElement.scrollTop = Math.floor(realY);
lastUpdateTime = timestamp;
requestAnimationFrame(scrollLoop);
};
// === HUD UPDATE ===
const updateHUD = () => {
hud.textContent = isPaused
? `PAUSED (Speed: ${scrollSpeed.toFixed(1)} px/s)`
: `Speed: ${scrollSpeed.toFixed(1)} px/s`;
hud.style.display = "block";
clearTimeout(hudTimeout);
if (!isPaused) hudTimeout = setTimeout(() => (hud.style.display = "none"), 2000);
};