Adobe announced that the Flash player for Linux will only be available for Google Chrome browser on Linux and has announced their plans to abandon future updates of Flash player for Linux. From the blog post:

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.

One can safely assume that Adobe wants to kill Flash on Linux for all other browsers except Google Chrome.