Replaced by World Weather+ Rated 1 out of 5 stars

This obsolete Thunderbird add-on has been replaced by World Weather+. Strangely WW+ appears only in search results for Sunbird add-ons. However, the description names both Thunderbird and Sunbird. WW+ installs and runs in Thunderbird 7.0.1.

https://addons.mozilla.org/en-US/sunbird/addon/world-weather-4144/