Simple Userscript that ensures Command+Click (or Ctrl+Click) opens links in a new tab on all websites. Can be used with ViolentMonkey or other similar extensions.

enableCtrlOrCmdClickNewTabOnAllSites.js

// ==UserScript==
// @name         Force Command+Click to Open in New Tab (Mac, Linux, and Windows)
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Ensure Command+Click (or Ctrl+Click) opens links in a new tab on all websites. Overrides client-side JS that disables this behavior.
// @author       Elijah Shackelford <eshack94>
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    document.addEventListener('click', function(event) {
        if (event.metaKey || event.ctrlKey) {
            const target = event.target;
            const anchor = target.closest('a');

            if (anchor && anchor.href) {
                event.stopImmediatePropagation();
                window.open(anchor.href, '_blank');
            }
        }
    }, true);
})();