About a year ago, Abode decided to discontinue support for Flash on the Android platform. With its security concerns, it's understandable why some people would want to disable Flash on their devices, but there are still some things you can't do without it. Amazon Instant Videos is one thing you can't do, giving you nothing but a "Flash Player is not installed" warning.
So, for today's softModder guide, I'm going to show you the ridiculously easy way to install it yourself on your Samsung Galaxy S3. This will enable you to watch Flash videos and even play a few touch optimized Flash-based games (not all Flash games will work).
Since Flash is no longer available in the Google Play Store, we're going to have to find and install it ourselves. That means enabling installation from "Unknown sources".
To do so, go to Menu -> Settings -> Security and check Unknown sources.
Thankfully, Adobe keeps an online archive of previous versions of their Flash software. On your GS3, simple click on this link to download the newest version of the Adobe Flash Player APK file (18.104.22.168).
Use your file browser to navigate to your downloads folder, or wherever you placed the file, and select it. Or, just tap the download in your notification drawer.
Now, install it like any other app, and you're done. You'll notice that you now have Flash Player Settings in your app drawer.
Keep in mind, if you use Chrome as your browser, Flash will not work whether it's installed or not. If you insist on using Chrome, you can download Flashify, a free app that allows you to use an alternative browser, like Firefox for Android (which does work with Flash), when you encounter Flash on a website.
That's it, your device is now fully Flash capable.