Guide: How to simply install Flash Player on Android 4.4 Kitkat devices

1) Download and install on your Android device Dolphin Browser free from Play Store. (Dolphin Browser v.10.2.0)

2) Download and install the hacked Flash Player from here, here or here. (Adobe Flash Player 11.1 android 4.4.apk)

3) Make sure that the flash setting in Dolphin Browser is on. (Click Menu > Settings > Web Content > Flash Player) 

4) Make sure that the Jetpak in Dolphin Browser is on. (Click Menu > Settings > Jetpak)

via forum.xda-developers.com