Userscripts.org

There are 2 previous versions of this script.

// ==UserScript==
// @name         FxForumNewTab
// @namespace    http://userscripts.org/people/5587
// @description  Opens posted links in new tabs
// @source       http://userscripts.org/scripts/show/49555
// @identifier   http://userscripts.org/scripts/source/49555.user.js
// @version      1.01
// @date         2009-05-19
// @creator      Arne Dieckmann (aka "Mithrandir")
// @include      http://www.camp-firefox.de/forum/*
// ==/UserScript==

var res = document.evaluate("//div[@class='content']/a|//blockquote/div/a", document, null,
                            XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE , null);
for(var i = 0; i < res.snapshotLength; i++) {
  var elem = res.snapshotItem(i);
  elem.target = "_blank";
}