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 Player 9 plugin on Linux/x86_64, NetBSD and FreeBSD platforms.
This is only a convenience release that brings local fixes that were available in various Linux or *BSD distributions. Here is a list of changes:
Please read the documentation for further details. In particular, I commented on an issue regarding Flash Player 9 and sound support.
It is also worth mentioning that NSPluginWrapper is now available to Debian unstable (Sid) contribs, openSUSE Factory, NetBSD and DragonFlyBSD pkgsrc repositories.
BTW, a user also reported that the Citrix ICA Client plugin works though I could not test it myself.