Puffin TV now requires a subscription to use properly so I would recommend install TV Bro for your browsing needs!
Web browser optimised to use with TV remote.
– working with TV remote
– tabs and bookmarks support
– voice search support
– switch user agent support
– use Android builtin web rendering engine (WebKit/Blink based)
– built-in download manager
– browsing history
Firstly we need to enable the option to install from unknown sources
Click Android TV OS build 7 times until you see a message that Developer Options have been enabled
Go back until you see the Apps menu item, click that
Click Security & Restrictions
Push the right arrow to move to the right side of the screen where apps are located
Turn on unknown sources for the Downloader app
Install the above using Downloader