nordinatueurgmail.com / T411Optimizer

// ==UserScript==
// @name        T411Optimizer
// @namespace   t411opt
// @include     http://www.t411.ch/*
// @version     1
// @grant       none
// ==/UserScript==

var nfos = document.querySelectorAll("[href*='/nfo/?']"), a;
for(var n=0; n<nfos.length;n++){
  a = document.createElement("a");
  a.classList.add("btn");
  a.href = nfos[n].href.replace("nfo","download");
  a.textContent = "Télécharger";
  nfos[n].parentNode.replaceChild(a,nfos[n]);
  a.style.color = "lightgreen";
}