browser private window activation condition

[Tunturi Timo]

Hi,

I'd like to use a browser private/incognito/inprivate/etc window activation condition for SPNEGO so that SPNEGO is never offered for browser private windows.

Seems like such a detection would be done in browser-side javascript doing something like this: https://github.com/Joe12387/detectIncognito

Is such interaction between server-side code and browser-side javascript possible? Or is there some other way to do what I want to do?

-- Timo Tunturi / Aalto Uni