I’m running Ubuntu 14.04 and my installed version of Adobe Flash works OK on those other browsers. In Brave Preferences, the “Enable Adobe Flash support” button is greyed out. I made certain my version of Flash was the same one as in the Brave link (for 64-bit linux) and I followed the suggestions in the troubleshooting Wiki by copying the Chrome profile files to “USR/Lib/pepperflashplugin-nonfree” as recommended. The pepperflash plugin for Linux is installed.
Homestarrunner.com comes up fine on Firefox and Chrome, but no-dice for Brave. Previous posts didn’t have any new info that I hadn’t already completed, so I’m trying to figure out what to try next.