Step-by-step – Flash Plugin Mint 20 Installation

Installing

2. 2. Installing Flash Plugin

   Then to Install Flash Plugin for Linux Mint.

   sudo apt install pepperflashplugin-nonfree

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

3. 3. Testing Flash Plugin

   Finally, to Check the Plugin is Correctly Installed
   On Firefox point to address:

   about:plugins

   On Opera:

   opera:plugins

Mint Best Software Installation Guides:
Best Software to Install on Linux Mint.