Always with Chrome iconized, if not installed "Google Chrome Extension" desktop notification does not work.
If "Google Chrome Extension" is installed, then it works the notification in the system tray, but does not connect with the phonebook stored.
Without installing "Google Chrome Extension" using the site FOP2 normally, and Chrome NOT iconized, everything works fine with popup connected to the global phonebook.

I checked the link above, but the settings are correct : "Allow all sites to show desktop notifications".

Thanks for your interest and sorry if I was not very clear.

13/07/2014
"Thanks for the reply.
Sorry, maybe i did not understand, I used Google Chrome because remember that some time ago it worked even if the popup iconized. Why do you say to use Google Crhome if the problem is just that? What I'm missing?
Thanks again, Regards"

Sorry, I get it. Perhaps you are referring to the use of the Google Chrome Extension, right?
With the Extension active popup works even if Chrome iconized, but only refers to the list of phone extensions and not to the phone book.

Thanks for the reply.
Sorry, maybe i did not understand, I used Google Chrome because remember that some time ago it worked even if the popup iconized. Why do you say to use Google Crhome if the problem is just that? What I'm missing?
Thanks again, Regards.

If the browser is iconized not get the popup on the screen.
Would be enough to have a message in the system tray. How can I do?
Thanks.

Regards