I followed the instructions here: Install Flash Player 11.1 on Nexus 4 for Android 4.2 Jelly Bean [How To] - Tutorial / Guide | Team Android
to install flash, but neither the rapidshare-apk nor the ones from adobe directly brought a flash support to my device.
The app gets installed but I don't have flash support in FF (I activated plugins there).
If I open the flash app it brings me to https://settings.adobe.com/flashplayer/mobile/
which is empty.