Rated 4 out of 5 stars
I have been using Forecastfox l10n for years, until recently I have migrated to Fx4. I was reluctant to use AccuWeather.com and preferred Weather.com, but now I have no preference over the source. And AccuWeather.com also hosts a couple of low-level location which was not found in Weather.com.
Also thanks for the icon theme mechanism. The setting page is fast and responsive.
I'd love to see if there is a "hover-and-expand" icon design :) But thank you for the work so far :)