// @description changes the profile links to badge page links, for quick checking which duplicate cards a profile has for said badge.

profilebadgelinker.user.js

// ==UserScript==
// @name         Steam badge page linker
// @namespace    https://steamcommunity.com/id/MalikQayum
// @version      0.2
// @description  changes the profile links to badge page links, for quick checking which duplicate cards a profile has for said badge.
// @author       MalikQayum
// @include      /^https?:\/\/steamcommunity\.com[/]+(id|profiles)[/]+[^/]+\/gamecards[/]+[^/]+(\/|)$/
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    $J("a[class^='persona']").each(function() {
        var $this = $J(this);
        var oldhref = $this.attr("href");
        $this.attr("href", oldhref + '/gamecards/'+location.href.split("/")[6]+'/').attr('target','_blank');
    });

})();