Another great add-on! Rated 4 out of 5 stars
Overall, it's a great add-on with the same quality Mike Singer is used to provide us with their counterpart free windows applications.
For whatever reason it is, temperatures are always displayed in F, even if C is selected in preferences configuration. A quick fix to this would be highly welcomed.
As a temporary fix, restart Firefox to reload the new conversion settings. This issue has been resolved in version 1.0.7 of the Weather Watcher Live extension. Until Mozilla posts this new version here, you can download it from my support forums.