I had to finally put up the "puffin" browser..Mine works now...but that is the ONLY browser I could get to work!
Flash Player from referenced site and Dolphin work for me as well. Make sure you are downloading the latest version from the section labeled "Flash Player for Android 4.0 archives".Fixed my Tab 3 flash issue by going to this link:
Archived Flash Player versions
I use Dolphin browser. Be sure to download the .apk version of flash & that you have the "allow app downloads from 3rd party....." box checked in your settings. This is the only thing that worked for me. (just now tested this link & it works)