Really useful!! Rated 5 out of 5 stars
I've been using this for a little over a year to keep track of when my Facebook friends around the globe were available!!
Recently, had a issue where I couldn't find the display on my toolbars, or customization page!! PANIC!!
Just noticed a few minutes ago, that it was hidden/or appeared, on a toolbar with a few other add-ons.
All is well, again!! :)