http://www.gibix.net/dokuwiki/en:projects:nspluginwrapper
nspluginwrapper is an Open Source compatibility plugin for Netscape 4 (NPAPI) plugins. That is, it enables you to use plugins on platforms they were not built for. For example, you can use the Adobe Flash plugin with x86-64 compiled Mozilla browsers.
nspluginwrapper is distributed under the terms of the GNU General Public License (GPL).