Greasy Fork is available in English.

PubMed Go To Publisher

Automatically redirect to PMC free PDF or publisher website for full text when you click on the title in the PubMed search result list

// ==UserScript==
// @name        PubMed Go To Publisher
// @version     0.2.0
// @author      sincostandx
// @description Automatically redirect to PMC free PDF or publisher website for full text when you click on the title in the PubMed search result list
// @namespace   https://greasyfork.org/users/171198
// @include     https://pubmed.ncbi.nlm.nih.gov/*
// ==/UserScript==

const pmc_link = document.querySelector('a.pmc');
if (pmc_link === null) {
  const doi_link = document.querySelector('a[data-ga-action="DOI"]');
  location.replace(doi_link.href);
} else {
  location.replace(pmc_link.href + "/pdf/main.pdf");
}