Via Mobileread forum from dnastase:
Based on a similar trick for the NG [Nook Glowlight] found how to access the builtin browser (I was wrong, there is one). It’s not practical, but in case one needs it, it may be worth it:
– go in a book
– try to share on Facebook
– in the dialog that pops up to login press “Help Center”
– a browser will pop up
That does me no good. The Nook demo models at Barnes & Noble aren’t linked to any Facebook account, so the Share icon is grayed-out as unavailable.
And I don’t think I want to try to set up a phony account.
Previously here:
Nook Glowlight Plus: Hidden Browser Trick Works?
Nook Touch Has Hidden But Functional Web Browser
Mike Cane’s xBlog 
It does me no good, either.
I can’t find a way to connect my FB account to my Nook account, so this won’t work for me.
Page 84 of the User Guide.
Actually, it turns out I don’t have to have an account. The help center link is there below the login box.
I will have to see what I can do with a demo Nook then. DevOps make it possible to turn off Demo Mode. *evil laugh*