Instantly accelerate websites by blocking trackers, removing render blockers and reducing background CPU usage.
// ==UserScript==
// @name PureRender: Instant-Web
// @namespace https://github.com/wandersons13/PureRender
// @version 0.5
// @description Instantly accelerate websites by blocking trackers, removing render blockers and reducing background CPU usage.
// @author wandersons13
// @match *://*/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=speedtest.net
// @run-at document-start
// @grant GM_addStyle
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// @license GNU
// ==/UserScript==
(function () {
"use strict";
/* -- CONFIG -- */
const host = location.hostname;
const path = location.pathname.toLowerCase();
const excludedHosts = /^(gemini\.google\.com|.*\.youtube\..*|youtube\..*|.*\.mega\..*|mega\..*)$/;
const directMedia = /\.(jpg|jpeg|png|gif|webp|avif|mp4|webm|svg)($|\?)/;
const trackerRegex = /(analytics|doubleclick|tracker|pixel|mixpanel|amplitude|hotjar|sentry|newrelic|segment)/i;
/* -- USER EXCLUSIONS -- */
const userExcluded = GM_getValue("excluded_sites", []);
const excluded = directMedia.test(path) || excludedHosts.test(host) || userExcluded.some(site => host === site || host.endsWith("." + site));
if (excluded) return;
/* -- UTIL -- */
const noop = () => {};
const isTrackerURL = url => {
if (!url || typeof url !== "string") return false;
const searchKeywords = /(search|suggest|autocomplete|query|api)/i;
if (searchKeywords.test(url)) return false;
if (url.startsWith("/") || url.includes(host) || url.startsWith(location.origin)) return false;
return trackerRegex.test(url);
};
/* -- TELEMETRY NEUTRALIZATION -- */
(function () {
const trackers = [
"ga", "gaGlobal", "GoogleAnalyticsObject", "dataLayer", "fbq",
"_gaq", "_gat", "monitoring", "newrelic",
"amplitude", "mixpanel", "intercom", "hubspot"
];
trackers.forEach(t => {
if (window[t]) window[t] = undefined;
});
try {
navigator.sendBeacon = () => false;
} catch (e) {}
console.clear = noop;
})();
/* -- NETWORK INTERCEPTION -- */
window.fetch = new Proxy(window.fetch, {
apply(target, thisArg, args) {
const url = typeof args[0] === "string" ? args[0] : args[0] ?.url;
if (isTrackerURL(url)) return Promise.resolve(new Response("", { status: 204}));
return Reflect.apply(target, thisArg, args);
}
});
const nativeXHR = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.open = function (method, url) {
if (isTrackerURL(url)) {
this.send = noop;
return;
}
return nativeXHR.apply(this, arguments);
};
/* -- SCRIPT FILTER -- */
document.addEventListener('beforescriptexecute', (e) => {
const script = e.target;
if (script.src && isTrackerURL(script.src)) {
e.preventDefault();
e.stopPropagation();
script.remove();
}
}, true);
/* -- PERFORMANCE MITIGATIONS -- */
/* slow abusive intervals */
const nativeSetInterval = window.setInterval;
window.setInterval = function (fn, delay, ...args) {
if (delay && delay < 200) delay = 200;
return nativeSetInterval(fn, delay, ...args);
};
/* requestIdleCallback throttle */
try {
window.requestIdleCallback = fn => setTimeout(fn, 50);
} catch (e) {}
/* disable sendBeacon */
try {
navigator.sendBeacon = () => false;
} catch (e) {}
/* -- TRACKER DOM CLEANUP -- */
document.addEventListener("DOMContentLoaded", () => {
/* remove ping tracking */
document.querySelectorAll("a[ping]")
.forEach(a => a.removeAttribute("ping"));
/* remove external preconnect */
document.querySelectorAll(
'link[rel="preconnect"],link[rel="dns-prefetch"],link[rel="prefetch"]'
).forEach(link => {
try {
const u = new URL(link.href);
if (u.hostname !== location.hostname) link.remove();
} catch (e) {}
});
});
/* -- IFRAME TRACKER BLOCK -- */
const iframeObserver = new MutationObserver(mutations => {
for (const m of mutations) {
m.addedNodes.forEach(node => {
if (node.tagName === "IFRAME" && node.src) {
try {
const r = node.getBoundingClientRect();
if (r.width <= 2 && r.height <= 2) node.remove();
} catch (e) {}
}
});
}
});
iframeObserver.observe(document.documentElement, {
childList: true,
subtree: true
});
/* -- WINDOW.OPEN FILTER -- */
try {
const nativeOpen = window.open;
window.open = function (url, ...rest) {
if (url && trackerRegex.test(url)) return null;
return nativeOpen.call(this, url, ...rest);
};
} catch (e) {}
/* -- VISIBILITY TRACKING MITIGATION -- */
try {
document.addEventListener(
"visibilitychange",
e => e.stopImmediatePropagation(),
true
);
} catch (e) {}
/* -- UI ACCELERATION -- */
GM_addStyle(`
html,body{
display:block !important;
visibility:visible !important;
opacity:1 !important;
scroll-behavior:auto !important;
}
*{
scroll-behavior:auto !important;
}
#preloader,.preloader,#loader,.loader,#loading,.loading,[class*="spinner"],[id*="spinner"],.loading-overlay,[class*="preloader-"],[id*="preloader-"],.overlay-fixed,#overlay-fixed {
display:none !important;
opacity:0 !important;
visibility:hidden !important;
pointer-events:none !important;
}
`);
const unlock = () => {
try {
document.body.style.setProperty(
"overflow", "auto", "important");
document.documentElement.style.setProperty(
"overflow", "auto", "important");
} catch (e) {}
};
window.addEventListener("load", unlock, {
once: true
});
setTimeout(unlock, 2000);
/* -- MENU -- */
GM_registerMenuCommand("🚫 Exclude this site", () => {
if (!userExcluded.includes(host)) {
userExcluded.push(host);
GM_setValue("excluded_sites", userExcluded);
location.reload();
}
});
GM_registerMenuCommand("🔄 Reset exclusions", () => {
GM_setValue("excluded_sites", []);
location.reload();
});
})();