Thanks for being so responsive, Chris. I think that the 'view notebook' [eye icon] is too out-of-the-way to notice.
IMO a design that might be less surprising would be for clicking on the name of the notebook to take you to the read-only view of the notebook. From there you could click on something that would promote it to an executable/editable view and login if necessary.
But the broken back button on login page is a real bummer.
EDIT either it was my imagination to begin with or it's already fixed because I tried it again and the back button appears to work correctly.
Any notebook can be opened in an html view: https://notebooks.azure.com/library/fsharp/html/FSharp%20for...
It sounds like you would like being able to view those more easily without logging in?
Thanks! Chris