The extension supports both sun and moon times, and in particular sunrise, sunset, twilight, moonrise and moonset times. Your first task after downloading and installing the extension, and restarting the web browser, is to add a specific location to the extension.

The extension ships with a continent > country > city lists. If you are lucky, your city or a big city nearby is listed in the configuration menu. You only need to select the city in this case to make it the city you get the sun and moon times information from.

If you cannot find your city or town in the list, you need to add latitude and longitude coordinates manually. You can use a service like GPS Coordinates to get those coordinates. Just enter them on the Sun Cult configuration screen and click ok to complete the configuration.

You can alternatively switch to Time to configure the time zone and format settings, as well as sunrise, sunset and twilight times. The Display tab finally determines the type of information and their placement in the Firefox browser.

The extension by default displays Twilight start, Twilight end, Sunrise and Sunset, as well as Moonrise, Moonset, the Moon Phase and the next full moon.

Additional times that are not displayed by default are Sunrise and Sunset azimuth, high noon, next new moon and Moonrise and Moonset azimuth. All information can be enabled or disabled selectively. It is also possible to change the location of the information from the status bar to another location like another toolbar.

Firefox users can download and install Sun Cult from the official Mozilla Firefox add-on repository.

Local time can be very important in these circumstances and probably several else. There are a lot of software programs and browser add-ons that display multiple time zones to the user. Firefox users for example can install the excellent computer alarm clock and timer Simple Timer which displays a clock in the Firefox status bar.

Localti.me is an online service. The major benefit of it is the fact that it can be used to quickly look up the local time, local data and local weather without installing and software or plugin. All it takes is to enter a country, state or region to get the requested information. The service will display suggestions as soon as the user begins typing in the name.

The results page will list the local time, local data and local weather along with other information about the selected location. These other information include maps (taken from Virtual Earth), Wikipedia information, the latest headlines, traveling information and pictures taken from Flickr and Panoramio.

Localti.me (via Make use of) is a nice to have service for quickly looking up the local time, date or weather of a location in the world.