Nspluginwrapper is a tool that allows you to run 32bit plugins in a 64bit browser. Nspluginwrapper is useful for running Adobe Flash till either Adobe decides to realease a 64bit linux plugin again or one of the alternatives (see lightspark, and gnash) has full support.
Nspluginwrapper should NOT be ran as root.
To see a list of currently loaded plugins:
nspluginwrapper -l
To automatically load all 32bit plugins:
nspluginwrapper -v -a -i
To automatically unload all 32bit plugins:
nspluginwrapper -v -a -r
Alternatively, you could just use a 32bit browser, but where is the fun in that!