How to copy the Flash plugin if the system is read-only?

english install
1

Hi,

Installed a few days ago, installed the Flash projector from the App Center… nothing works. How i should install the flash plug-in for Chrome, Mozilla?

2

https://support.endlessm.com/hc/en/articles/208248596-Meu-computador-suporta-Flash-Adobe-Flash-

3

It is not working. I am at the computer in question now…