Adobe Flash Player is the high-performance, lightweight, highly expressive application runtime that provides uncompromised viewing of expressive applications, content, and videos across browsers, mobile phones, devices and operating systems. Deliver more engaging user experiences with the Adobe Flash Player runtime through support for native 64-bit operating systems and browsers, accelerated graphics rendering, asynchronous bitmap decoding, high-resolution bitmap support, and more. Take advantage of a host of new features in the Adobe Flash Player runtime that streamline the development process, improve performance, enable greater security and privacy control, and allow delivery of richer apps to a broader spectrum of devices

The version that compatible with Mozilla Firefox, Opera and Google Chrome from here or here