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Automatically detects and immediately redirects Amazon search results to the 'Best Sellers' sort order, bypassing the default 'Featured' sort and eliminating page double-loads.
// ==UserScript==
// @name Amazon Auto-Sort by Best Sellers
// @namespace http://tampermonkey.net/
// @version 1.7
// @description Automatically detects and immediately redirects Amazon search results to the 'Best Sellers' sort order, bypassing the default 'Featured' sort and eliminating page double-loads.
// @author Gemini
// @match *://*.amazon.com/s*
// @match *://*.amazon.co.uk/s*
// @match *://*.amazon.de/s*
// @match *://*.amazon.ca/s*
// @match *://*.amazon.fr/s*
// @match *://*.amazon.it/s*
// @match *://*.amazon.es/s*
// @match *://*.amazon.co.jp/s*
// @match *://*.amazon.com.au/s*
// @run-at document-start
// @grant none
// @license CC BY 4.0
// ==/UserScript==
/*
* This work is licensed under the Creative Commons Attribution 4.0 International License.
* To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
* or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
*/
(function() {
// Check if the current page is an Amazon search results page (URL path starts with '/s')
if (window.location.pathname.startsWith('/s')) {
'use strict';
// --- Configuration ---
// The value attribute for the "Best Sellers" sort order, confirmed to be correct for direct URL manipulation.
const BEST_SELLERS_SORT_VALUE = 'exact-aware-popularity-rank';
// ---------------------
const url = new URL(window.location.href);
const urlParams = url.searchParams;
const currentSort = urlParams.get('s');
console.log(`TAMPERMONKEY DEBUG: Current URL is an Amazon search page: ${window.location.href}`);
console.log(`TAMPERMONKEY DEBUG: Current 's' URL parameter is: ${currentSort}`);
// 1. Check if the URL already contains the correct sort value
if (currentSort === BEST_SELLERS_SORT_VALUE) {
console.log(`TAMPERMONKEY DEBUG: Sort is already set to target value '${BEST_SELLERS_SORT_VALUE}'. No action needed.`);
return; // Stop execution if already sorted
}
// 2. Immediate Redirection: Construct the new URL from existing parameters
// Preserve all existing query parameters but force the 's' parameter to our target value.
urlParams.set('s', BEST_SELLERS_SORT_VALUE);
// Amazon sometimes adds a 'ref' parameter that points to the previous sort state.
// We replace it with the known 'Best Sellers' reference for a clean navigation.
const knownBestSellersRef = 'sr_st_exact-aware-popularity-rank';
if (urlParams.has('ref')) {
// Check if the existing ref already contains a sort reference we should replace
const refValue = urlParams.get('ref');
if (refValue.startsWith('sr_st_')) {
urlParams.set('ref', knownBestSellersRef);
} else {
// For general search entry points, we can append the sort ref cleanly
urlParams.set('ref', knownBestSellersRef);
}
} else {
// If no 'ref' exists, add the Best Sellers ref
urlParams.set('ref', knownBestSellersRef);
}
// Update the full URL string
const newUrl = url.toString();
console.log(`Amazon Auto-Sort: Current sort is '${currentSort}'. Forcing immediate redirect to Best Sellers.`);
console.log(`TAMPERMONKEY DEBUG: Redirecting to: ${newUrl}`);
// Perform the direct navigation, preventing the initial page from loading.
window.location.replace(newUrl);
}
})();