Disable HTTP referer by adding rel="noreferrer". This prevents the destination site from receiving what URL the user came from. Press Command + Shift + F to toggle Referrer Policy.
// ==UserScript==
// @name No Referrer
// @description Disable HTTP referer by adding rel="noreferrer". This prevents the destination site from receiving what URL the user came from. Press Command + Shift + F to toggle Referrer Policy.
// @author Schimon Jehudah, Adv.
// @namespace i2p.schimon.noreferrer
// @homepageURL https://greasyfork.org/en/scripts/465950-no-referrer
// @supportURL https://greasyfork.org/en/scripts/465950-no-referrer/feedback
// @copyright 2023 - 2024, Schimon Jehudah (http://schimon.i2p)
// @license MIT; https://opensource.org/licenses/MIT
// @match file:///*
// @match *://*/*
// @exclude devtools://*
// @version 24.04
// @run-at document-end
// @icon data:image/svg+xml;base64,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
// ==/UserScript==
var namespace = 'i2p-schimon-noreferrer';
document.addEventListener('keyup', hotkey, false);
function hotkey(e) {
// set hotkey Ctrl + Shift + 5
//if (e.ctrlKey && e.shiftKey && e.which == 53) {
// set hotkey Command + Shift + R
//if (e.metaKey && e.shiftKey && e.which == 82) {
// set hotkey Command + Shift + F
if (e.metaKey && e.shiftKey && e.which == 70) {
toggleNoReferrer();
}
}
function toggleNoReferrer() {
if (document.querySelector(namespace)) {
appendNoReferrer();
document.querySelector(namespace).remove();
} else {
removeNoReferrer();
warningBar();
}
}
function appendNoReferrer() {
let elements = ['area', 'form'];
for (let i = 0; i < elements.length; i++) {
for (const element of document.querySelectorAll(elements[i])) {
element.rel = 'nofollow noopener noreferrer';
}
}
for (const element of document.querySelectorAll('link')) {
element.referrerPolicy = 'no-referrer';
}
// TODO
// Do we need array "elements"?
// Probably not, because we handle 'a[href]' which isn't related to array "elements".
// I think this for loop should not be here
for (let i = 0; i < elements.length; i++) {
for (const element of document.querySelectorAll('a[href]')) {
// TODO CSS Selector to select a[href] which does
// not start with hash, instead of "if" statement
if (!element.href.startsWith(element.baseURI + '#')) {
element.rel = 'nofollow noopener noreferrer';
}
}
}
// Event delegation works and requires JS enabled
document.body.addEventListener ("click", function(e) {
if (e.target && e.target.nodeName == "A" && e.target.href) {
if (!e.target.href.startsWith(e.baseURI + '#') ||
!document.querySelector(namespace)) { // TODO Test
e.target.rel = 'nofollow noopener noreferrer';
}
}
});
}
function removeNoReferrer() {
for (const element of document.querySelectorAll('[rel="noreferrer"]')) {
element.removeAttribute('rel');
}
for (const element of document.querySelectorAll('[referrerpolicy="no-referrer"]')) {
element.removeAttribute('referrerpolicy');
}
}
function warningBar() {
let bar = document.createElement(namespace);
document.body.append(bar);
bar.innerHTML = '<b>WARNING! Referrer Policy has been <u>temporarily</u> enabled;<!-- br --> Reload page or click <code style="color: navajowhite;background: black;border-radius: 1em;padding: 3px;font-family: monospace;font-size: smaller;">Command</code> + <code style="color: navajowhite;background: black;border-radius: 1em;padding: 3px;font-family: monospace;font-size: smaller;">Shift</code> + <code style="color: navajowhite;background: black;border-radius: 1em;padding: 3px;font-family: monospace;font-size: smaller;">F</code> to restore privacy mode. (i.e. no-referrer)</b>'; // 🫵
bar.title = 'Click to reload';
//bar.title = 'Restore privacy mode by 𝐂𝐨𝐦𝐦𝐚𝐧𝐝 + 𝐒𝐡𝐢𝐟𝐭 + 𝐑 or click this bar to reload page.';
bar.id = namespace;
bar.style.backgroundColor = 'red'; // #2c3e50 coral indianred
bar.style.color = 'white'; // #eee navajowhite
bar.style.fontFamily = 'system-ui';
bar.style.right = 0;
bar.style.left = 0;
bar.style.top = 0;
bar.style.zIndex = 10000000000;
bar.style.padding = '6px'; //13px //15px //11px //9px //3px //1px
bar.style.position = 'fixed';
bar.style.textAlign = 'center'; // justify
bar.style.direction = 'ltr';
// set bar behaviour
bar.onclick = () => {
bar.style.display = 'none';
location.reload();
};
}
(function appendNoReferrerToLink() {
// Add element <link/> with rel="noreferrer".
// Some consider <link rel="noreferrer"/> as invalid.
let link = document.createElement('link');
document.head.append(link);
link.referrerPolicy = 'no-referrer';
link.rel = 'nofollow noopener noreferrer';
})();
appendNoReferrer();