Plugin "Simple notifications for Jira"
Messages come within 5-10 seconds. By default does not show messages in admin pages.
How ON/OFF Notifications?
default user settings - show: off
Simple notifications are not sent to the author of the changes, even if the profile set “My Changes: Notify me”
First way
Open simple notification settings
2. Select show or hide issue notifications
Second way
Open profile page
2. Select show or hide issue notifications