The current version is 3.3.26, released October 30th, 2013.
FoxClocks is an extension for Google Chrome, Firefox and Thunderbird that lets you keep an eye on the time around the world – or just your local time – by putting small clocks in your statusbar. Choose from a set of useful standard time formats or create your own – custom formats are easy to create and very flexible.
FoxClocks is available in many languages.