One interesting option is the support for different time zones that can be combined with the notifications. It is for example possible to add the New York, Tokyo and London timezones to the application and receive notifications using the time in these timezones.

Multiple locations – each with their distinct timezone – can be added in the options of the add-on for the Firefox web browser. It is a bit unfortunate that only the local timezone can be displayed in the status bar while the other timezones become only visible when hovering the mouse over the icon and only if that feature has been enabled in the options. Notifications can be added easily in the options as well.

They can be created by selecting a time, timezone and description for the notification. Configuring it to recur and the addition of an url are optional. Simple Timer is an excellent Firefox add-on for users who would like to have access to a system clock on their screen. The notifications, countdowns and timezones are an added bonus that might be interesting for some users as well.