Yes, extensions that include NPAPI are a very small minority. Last time I checked there were something like 5. It is a way out for people who already have binary code that they would like to reuse, or who need to talk to the platform.
I don't see what the big deal is about a few extensions only supporting a particular platform. As long as it is clear to users (you're right, we need to do this), I think this is ok. - a -- Chromium Developers mailing list: chromium-dev@googlegroups.com View archives, change email options, or unsubscribe: http://groups.google.com/group/chromium-dev