FoxClocks

FoxClocks is an extension that will show multiple clocks in the browser's statusbar, toolbars or menubar for any of hundreds of cities around the globe, using a database of time zone and daylight saving information. FoxClocks' Zone Picker tree lets you browse virtually all the world's time zones by country, region or city. Enable automatic database updates and you'll always have the right time.

What is new in this release:

Version 3.1.26 fixed automatic time zone database checks swamping foxclocks.org.

Requirements:

Mozilla Firefox 10.0, SeaMonkey 2.7, Thunderbird 10.0