FoxClocks is Firefox add-ons which lets Firefox 5 display the World time on the status bar. It is a very simple tool that allows users to have clock based on user preferences including their local time.
If you want to have your local time displayed on the status then you can use the Zone Picker to select your preferred clock.
The ZonePicker can be launched by right clicking the Firefox status bar and selecting FoxClocks from the list
The other key features of FoxClocks are
- Options for changing clock colours during certain hours
- Standard and Custom time formats
- Integration with Google Earth
- Available in different languages other than English
Check out this link for more detail information about FoxClocks