How does it only affect linux firefox users? I think you're right about Adobe's motives, but it certainly affects any linux browser that could use libflashplayer, no? Ie Chrom*, Opera..
They're dropping the NPAPI (Netscape Plugin API) version on Linux.
Chrome currently ships with both an NPAPI version of Flash, and a PPAPI (Pepper - basically a replacement plugin API developed by Google, as an offshoot of NaCl) version. The PPAPI version will still be updated, so when the next version of Flash comes out, Chrome will just use the PPAPI version.
But the PPAPI version will only be shipped with Chrome, and only Chrome / Chromium support PPAPI plugins. Any Linux users using any browser other than Chrome will basically be out of luck.
