Link: Adobe and Google Partnering for Flash Player on Linux « Adobe AIR and Adobe Flash Player Team Blog

...For Flash Player releases after 11.2, the Flash Player browser plugin for Linux will only be available via the “Pepper” API as part of the Google Chrome browser distribution and will no longer be available as a direct download from Adobe. Adobe will continue to provide security updates to non-Pepper distributions of Flash Player 11.2 on Linux for five years from its release...