Browser logout by Time

Hi, i have a problem, may someone can help.
What i want: I want to keep my Lastpass open even if i close my Browser BUT ONLY FOR A LIMITED TIME.
So thats why i use this Setting: (click on) Automatic logout when all browsers are closed since (10 minutes)
But if i close my browser, i have always to relogin, even after 1 second.
If i dont use the automatic logoff after Browser is closed, it stays on, even if i reboot my PC after 1 hour.
So how can i get this done to keep Lastpass open even after closing the browser for only 10 minutes after the browser is closed ?
Thanks for help
Cheers
JRB
What i want: I want to keep my Lastpass open even if i close my Browser BUT ONLY FOR A LIMITED TIME.
So thats why i use this Setting: (click on) Automatic logout when all browsers are closed since (10 minutes)
But if i close my browser, i have always to relogin, even after 1 second.
If i dont use the automatic logoff after Browser is closed, it stays on, even if i reboot my PC after 1 hour.
So how can i get this done to keep Lastpass open even after closing the browser for only 10 minutes after the browser is closed ?
Thanks for help
Cheers
JRB