Rated 3 out of 5 stars
I like this that's why I have it in my Spring Favorites, however, this year I am unable to make it show on my page.This user has a previous review of this add-on.
I am sorry it doesn's show up for you. Try this address and see if it does: https://addons.mozilla.org/en-US/firefox/addon/spring-sensation/
If it doesn't there might be a problem with your settings. Email me if it doesn't show up and I will check it out.