How to close pgAdmin4

Good morning,

I would like to know how to "really" close pgAdmin4.

When I close the pgAdmin4 tab or the browser supporting pgAdmin4
(Firefox 67.0.4), this does not close pgAdmin4.  It still resides in
Task Manager (Windows 10).

This is very inconvenient.  If after closing pgAdmin4 I try and delete a
database via other means (eg psql) I get the following error message:

    DROP DATABASE IF EXISTS development;

    ERROR:  database "development" is being accessed by other users
    DETAIL:  There are 2 other sessions using the database.

This forces me to start Task Manager, scroll down to pgAdmin4 and select
End Task.

How do I close pgAdmin4 so it is no longer running on the computer and I
can avoid these nuisance steps.

Thanks,

George