Rated 4 out of 5 stars

Working a treat on Mavericks with FF 45.

Only question would, in your description there is a gray lock screen, and a nicer translucent blue one. I can only get the gray lock screen. How do I get the blue one?

Thanks for a nice add-on

This review is for a previous version of the add-on (1.21.6). 

You probably going to need downgrade to Windows 7...the transparency/color is OS itself feature.