RE: NPAPI being dropped end of 2016?

Thanks, Ben.

Our HyperWorks Desktop product is a CAE suite that includes a HTML report generating capability.  The HTML reports have the option to embed our HyperView Player as a browser plugin, so that the user can interact with a live CAE post-processing model from within the browser window.

What's the recommended path to replace our NPAPI based plugin?  Our existing plugin leverages a lot of C++ code and libraries shared with our full HyperWorks Desktop suite.   I don't think rewriting our code in JS + WebGL is realistic. 

Is it possible to write a Firefox extension that launches a copy of our plugin residing on the user's disk, and passes it the referenced CAE file to run out-of-proc?