Get 32bits firefox plugins available under 64bits system

There is various article about this, but I have not found all needed information into only one.
This is a quick method to get 32bits firefox plugins available under 64bits system:
- install wished 64bits plugins,
- install 32bits plugins if there is no 64bits version (like for macromedia flash),
- install nspluginwrapper 64 and 32 bits (important to have the two versions),
- ensures 32bits plugins are available under /usr/lib/mozilla/plugins (or create symbolic links),
- ensures 64bits plugins are available under /usr/lib64/mozilla/plugins (or create symbolic links),
- according to your OS, it may then be enough to restart firefox (like under Fedora 8),
- else, use the mozilla-plugin-config -i command.

It is possible to not create symbolic link, and to specify path of corresponding .so file with the mozilla-plugin-config -i.

Each wrapped plugins should be under
/usr/lib64/mozilla/plugins-wrapped (or maybe equivalent). If it is not the case, you can use the -v option while using mozilla-plugin-config.

Finally, under Firefox, you should see all available plugins under "about:plugins".