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Remove Amazon Tracking Parameters (All Domains)

Aggressive approach to remove Amazon tracking parameters across all country domains

  1. // ==UserScript==
  2. // @name         Remove Amazon Tracking Parameters (All Domains)
  3. // @namespace    http://tampermonkey.net/
  4. // @version      2.0
  5. // @description  Aggressive approach to remove Amazon tracking parameters across all country domains
  6. // @include       *://*.amazon.*/*
  7. // @grant        none
  8. // @run-at       document-start
  9. // @license      MIT
  10. // ==/UserScript==
  11.  
  12. (function() {
  13.     'use strict';
  14.  
  15.     /**
  16.      * Removes tracking from the current URL if it matches an Amazon product page
  17.      * and rewrites history to a clean version of the URL.
  18.      */
  19.     function cleanAmazonUrl() {
  20.         var currentURL = window.location.href;
  21.         // Matches /dp/ASIN or /gp/product/ASIN with a 10-character code
  22.         // The 'i' flag lets it match uppercase or lowercase letters/numbers
  23.         var asinPattern = /\/(?:dp|gp\/product)\/([A-Z0-9]{10})(?:[/?]|$)/i;
  24.         var match = asinPattern.exec(currentURL);
  25.         if (match) {
  26.             var asin = match[1];
  27.             var newURL = window.location.protocol + '//' + window.location.host + '/dp/' + asin;
  28.             if (newURL !== currentURL) {
  29.                 // Rewrite the URL in the address bar without triggering a page reload
  30.                 window.history.replaceState({}, document.title, newURL);
  31.             }
  32.         }
  33.     }
  34.  
  35.     // --- Hook into history methods and popstate to catch all Amazon URL changes --- //
  36.  
  37.     var _pushState = history.pushState;
  38.     var _replaceState = history.replaceState;
  39.  
  40.     // Override pushState
  41.     history.pushState = function(state, title, url) {
  42.         var ret = _pushState.apply(this, arguments);
  43.         // After pushState is called, clean the URL
  44.         setTimeout(cleanAmazonUrl, 10);
  45.         return ret;
  46.     };
  47.  
  48.     // Override replaceState
  49.     history.replaceState = function(state, title, url) {
  50.         var ret = _replaceState.apply(this, arguments);
  51.         // After replaceState is called, clean the URL
  52.         setTimeout(cleanAmazonUrl, 10);
  53.         return ret;
  54.     };
  55.  
  56.     // Also listen for popstate (back/forward browser buttons)
  57.     window.addEventListener('popstate', function() {
  58.         // Clean the URL after a brief delay
  59.         setTimeout(cleanAmazonUrl, 10);
  60.     });
  61.  
  62.     // Lastly, do an initial cleanup as early as possible (document-start)
  63.     cleanAmazonUrl();
  64. })();