blocker.js

/*
    Copyright (C) 2026  IsHacker

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/

// Some non-working attempts to block tracking through iframes (e.g Youtube, ogs.google.com)

/*const csp_tag = 'default-src \'unsafe-inline\' * data:; script-src \'unsafe-inline\' https://*.ytimg.com https://*.google.com https://*.googleusercontent.com https://*.googleapis.com https://*.youtube.com https://*.youtube-nocookie.com https://*.googlevideo.com https://*.gstatic.com; connect-src \'unsafe-inline\' https://*.ytimg.com https://img.youtube.com https://*.googlevideo.com https://www.google.com https://*.gstatic.com https://*.googleusercontent.com;';

console.log("Using CSP: "+csp_tag);

function addCsptoIframes() {
      var a_iframes = document.querySelectorAll("iframe");
      for (var i = 0; i < a_iframes.length; i++) {a_iframes[i].csp = csp_tag;}
}

const iframe_observer = new MutationObserver(addCsptoIframes);
iframe_observer.observe(document, { childList: true, subtree: true });
*/

/*function sandboxIframes() {
      var a_iframes = document.querySelectorAll("iframe");
      for (var i = 0; i < a_iframes.length; i++) {a_iframes[i].sandbox = "allow-same-origin";}
}

const iframe_observer = new MutationObserver(sandboxIframes);
iframe_observer.observe(document, { childList: true, subtree: true });
*/


// Intercept and block tracking urls by hooking into XHR and fetch methods

// XHR
(function() {
    let _open = XMLHttpRequest.prototype.open;
    XMLHttpRequest.prototype.open = function(method, url, async, user, password) {
       _open.call(this, method, url, async=async, user=user, password=password)
    }
    let _send = XMLHttpRequest.prototype.send;
    XMLHttpRequest.prototype.send = function(data) {
        let _onload  = this.onprogress;
        this.onload = function() {
	console.log("Allowed: "+this.responseURL);
            if (_onload != null) {
                _onload.call(this)
            }
        }
	// Since we can't know the request URL for xhr.send(), we distinguish tracking requests by their request body
	// If it starts with "[" or "[[", it is a tracking request
	// Legit POST requests won't start with those brackets, e.g POST requests for image uploads for Google Lens Search will start with binary data
	if (data != null && data.startsWith("[")) {
	       console.log("Blocked tracking request!");
	}
        else {
	   _send.call(this, data);
	}
    }
})();

// fetch
const { fetch: originalFetch } = window;
window.fetch = async (...args) => {
    let [resource, config ] = args;

    if (resource.includes('/log?') || resource.includes('_204')) {
	console.log("Blocked: "+resource);
	resource = "";
	return true;
    }
    else {
	console.log("Allowed: "+resource);
    }

    const response = await originalFetch(resource, config);

    return response;
}


// Block gen_204 beacons


function blockTrackingBeacons() {
     console.log("Blocked tracking beacon!");
     return true;
}

Object.defineProperty(window.Navigator.prototype, 'sendBeacon', {
  get: function() {
    return blockTrackingBeacons;
  },
  set: function(ignored) { }
});

if (defglog == 1) {

Object.defineProperty(window.google, 'log', {
  get: function() {
    return blockTrackingBeacons;
  },
  set: function(ignored) { }
});

Object.defineProperty(window.google, 'logUrl', {
  get: function() {
    return blockTrackingBeacons;
  },
  set: function(ignored) { }
});

Object.defineProperty(window.google, 'ml', {
  get: function() {
    return blockTrackingBeacons;
  },
  set: function(ignored) { }
});

}

// Alternative implementation taken from "Don't track me google" userscript

/*(function() {
        var navProto = window.Navigator.prototype;
        var navProtoSendBeacon = navProto.sendBeacon;
        if (!navProtoSendBeacon) {
            return;
        }
        var sendBeacon = Function.prototype.apply.bind(navProtoSendBeacon);

        navProto.sendBeacon = function(url, data) {
             console.log("Blocked tracking beacon!");
             return true;
       };
})();
*/




// AI overviews
// Sometimes the AI overview is part of the received html document, and isn't generated by JS. This makes it impossible to "block" them, so we just hide them
// Taken from https://github.com/zbarnz/Google_AI_Overviews_Blocker

// AI Overview text patterns for different languages
const AI_OVERVIEW_PATTERNS = [
  /übersicht mit ki/i, // de
  /ai overview/i, // en
  /prezentare generală generată de ai/i, // ro
  /AI による概要/, // ja
  /Обзор от ИИ/, // ru
  /AI 摘要/, // zh-TW
  /AI-overzicht/i, // nl
  /Vista creada con IA/i, // es
  /Přehled od AI/i, // cz
];

// CSS selectors for AI overview containers
const AI_OVERVIEW_SELECTORS = {
  SEARCH_RESULT_SELECTOR: "div#rso > div > div", 
  ABOVE_SEARCH_RESULTS_SELECTOR: "div#rcnt > div", 
};

// Main DOM selectors
const DOM_SELECTORS = {
  MAIN_BODY: "div#rcnt",
  HEADER_TABS: "div#hdtb-sc > div",
  MAIN_ELEMENT: '[role="main"]',
  PEOPLE_ALSO_ASK: "div.related-question-pair",
  TABS_LIST: '[role="list"]',
};

// CSS values
const CSS_VALUES = {
  HIDDEN: "none",
  HEADER_PADDING: "12px",
  MAIN_MARGIN: "24px",
};

// Tab patterns
const TAB_PATTERNS = {
  AI_MODE: /^AI Mode$/i,
};

// Hide AI overview
(function () {
    'use strict';

    const hideAIO = () => {
        const aiBlocks = document.querySelectorAll('div[jscontroller="EYwa3d"]');
        aiBlocks.forEach(el => {
            el.style.display = 'none';
            el.style.visibility = 'hidden';
        });

	const aiButton = document.querySelectorAll('button[jscontroller="jNZDL"]');
        aiButton.forEach(elb => {
            elb.style.display = 'none';
            elb.style.visibility = 'hidden';
        });

        const extraEl = document.querySelector('#Odp5De > div:nth-child(1) > div');
        if (extraEl) {
            extraEl.style.display = 'none';
            extraEl.style.visibility = 'hidden';
        }

        const extraEl2 = document.querySelector('#m-x-content > div');
        if (extraEl2) {
            extraEl2.style.display = 'none';
            extraEl2.style.visibility = 'hidden';
        }
    };

    hideAIO();

    const observer = new MutationObserver(hideAIO);
    observer.observe(document, { childList: true, subtree: true });
})();

const getAiOverview = (mainBody) => {
  // Find all headings that match AI overview patterns
  const aiTexts = [...mainBody?.querySelectorAll("h1, h2")].filter((e) =>
    AI_OVERVIEW_PATTERNS.some((pattern) => pattern.test(e.innerText))
  );

  // For each matching heading, check both possible div containers
  for (const aiText of aiTexts) {
    // Check AI overview as a search result
    const aiOverviewAsResult = aiText?.closest(AI_OVERVIEW_SELECTORS.SEARCH_RESULT_SELECTOR);
    if (aiOverviewAsResult) return aiOverviewAsResult;
    
    // Check AI overview above search results
    const aiOverviewAbove = aiText?.closest(AI_OVERVIEW_SELECTORS.ABOVE_SEARCH_RESULTS_SELECTOR);
    if (aiOverviewAbove) return aiOverviewAbove;
  }

  return null;
};

const n_observer = new MutationObserver(() => {
  // each time there's a mutation in the document see if there's an ai overview to hide
  const mainBody = document.querySelector(DOM_SELECTORS.MAIN_BODY);

  // Commented out because it's not working

  // const aiOverview = getAiOverview(mainBody);

/*  // Hide AI overview
  if (aiOverview) aiOverview.style.display = CSS_VALUES.HIDDEN;
*/

  // Restore padding after header tabs
  const headerTabs = document.querySelector(DOM_SELECTORS.HEADER_TABS);
  if (headerTabs) headerTabs.style.paddingBottom = CSS_VALUES.HEADER_PADDING;

  // For debugging
  // console.log([...mainBody?.querySelectorAll('h1, h2')].map(e => { return { text: e.innerText, obj: e }}));
  const mainElement = document.querySelector(DOM_SELECTORS.MAIN_ELEMENT);
  if (mainElement) {
    mainElement.style.marginTop = CSS_VALUES.MAIN_MARGIN;
  }

  // Remove entries in "People also ask" section if it contains "AI overview"
  const peopleAlsoAskAiOverviews = [
    ...document.querySelectorAll(DOM_SELECTORS.PEOPLE_ALSO_ASK),
  ].filter((el) => AI_OVERVIEW_PATTERNS.some((pattern) => pattern.test(el.innerHTML)));

  peopleAlsoAskAiOverviews.forEach((el) => {
    el.parentElement.parentElement.style.display = CSS_VALUES.HIDDEN;
  });

  // Hide AI Mode tab
  const tabsList = document.querySelector(DOM_SELECTORS.TABS_LIST).children;
  const aiModeTab = tabsList[0];

  const text = aiModeTab.innerText.trim();

  if (TAB_PATTERNS.AI_MODE.test(text)) {
    aiModeTab.style.display = CSS_VALUES.HIDDEN;
  }
});

n_observer.observe(document, {
  childList: true,
  subtree: true,
});


// Disable AMP
// Taken from AdGuard Disable AMP userscript
!function(){"use strict";var t=/(amp\/|amp-|\.amp)/,e=["#amp-mobile-version-switcher > a",'head > link[rel="canonical"]'],r=function(t){new MutationObserver(t).observe(document,{childList:!0,subtree:!0})},n=function(){var t=e.reduce((function(t,e){return t||document.querySelector(e)}),null);if(!t)return null;if(!function(t){try{return new URL(t),!0}catch(t){return!1}}(t.href))return null;var r=new URL(t.href);return r.searchParams.has("amp")&&r.searchParams.delete("amp"),r.href},a=function(t){var e=t.querySelector('[aria-label="AMP logo"], [aria-label="Logo AMP"]');e&&(e.style.display="none")};function o(t){return function(t){if(Array.isArray(t))return i(t)}(t)||function(t){if("undefined"!=typeof Symbol&&null!=t[Symbol.iterator]||null!=t["@@iterator"])return Array.from(t)}(t)||function(t,e){if(t){if("string"==typeof t)return i(t,e);var r={}.toString.call(t).slice(8,-1);return"Object"===r&&t.constructor&&(r=t.constructor.name),"Map"===r||"Set"===r?Array.from(t):"Arguments"===r||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(r)?i(t,e):void 0}}(t)||function(){throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}()}function i(t,e){(null==e||e>t.length)&&(e=t.length);for(var r=0,n=Array(e);r<e;r++)n[r]=t[r];return n}var c,u,l,s="https://",f=["ping","data-ved","data-amp-cur","data-amp-title","data-amp","data-amp-vgi","jsaction"],d="google.";u=(c=document.location).href,l=c.origin,u.includes("https://yandex.ru/turbo")||u.includes("turbopages.org")?function(){var t=n();if(t)document.location.href=t;else{var e=document.querySelector('script[data-name="post-message"][data-message]');if(e&&t){var r=e.getAttribute("data-message"),a=JSON.parse(r);a&&a.originalUrl&&(document.location.href=a.originalUrl)}}}():(l.includes(d)&&u.includes("/search")&&r((function(){var t=document.querySelectorAll("a[data-ved]:has(> div[class] > span + svg)"),e=[];t.forEach((function(t){var r=t.previousElementSibling;r&&r.hasAttribute("data-ved")&&e.push(r)}));var r=document.querySelectorAll("a[data-amp]"),n=document.querySelectorAll("a[data-amp-vgi]");[].concat(o(r),o(n),o(t),e).forEach((function(t){f.forEach((function(e){t.removeAttribute(e)}))}))})),l.includes(d)||function(){if(document.querySelector('script[src^="https://cdn.ampproject.org/"]')){var t=n();t&&(document.location.href=t)}}(),l.includes("news.google.")?r((function(){window.self===window.top&&document.querySelectorAll("article > a[jslog]").forEach((function(e){var r=function(e){var r,n=e.substring(e.indexOf(":")+1,e.indexOf("; track:click,vis"));try{r=JSON.parse(atob(n))}catch(t){}if(!r)return null;var a=r.filter((function(t){return"string"==typeof t&&(t.startsWith("http")||t.startsWith("https"))}));return a.length<2?null:a.find((function(e){return!t.test(e)}))||null}(e.getAttribute("jslog"));r&&function(t,e){t.setAttribute("href",e),t.addEventListener("click",(function(t){t.preventDefault(),t.stopPropagation(),document.location.href=e}),!0),a(t)}(e,r)}))})):r((function(){document.querySelectorAll("a[data-amp-cdn]").forEach((function(t){var e=t.href;e.includes("cdn.ampproject.org")&&(e=s+e.substr(e.indexOf("cdn.ampproject.org/wp/s/")+24)),e.substr(8).startsWith("amp.")&&(e=s+e.substr(12)),(e=e.replace("?amp&","?&"))!==t.href&&(t.setAttribute("href",e),t.addEventListener("click",(function(t){t.preventDefault(),t.stopPropagation(),document.location.href=e}),!0),a(t))}))})))}();