I just updated to Ubuntu 16.04 and now my adobe flash plugin for my Chromium browser doesn't work. Any advice? I've tried downloading Pepper Flash, but that doesn't work.
Pepperflash does not work in 32 bit machines anymore since Chrome stopped supporting 32 bit linux.
If you do have a 32 bit Ubuntu installation, then I recommend you download adobe-flashplugin.
First remove pepperflash
sudo apt-get purge --remove pepperflashplugin-nonfree
sudo apt-get autoremove
sudo apt-get install adobe-flashplugin
Once is installed go to http://www.adobe.com/software/flash/about/
and check that flash 11 is installed.