Nice, but pay attention to the remarks Rated 4 out of 5 stars

This thing works nice. A few have commented about the invisible cursor. It is easily fixed by the addon Night Launch Companion. I also have Theme, Font, & Size changer installed. Together they help it do its job. If your browser tabs are not on bottom where you want them just go to about:config and scroll to "browser.tabs.on Top" and change it to false. Some tweaking but compared to Noia 4 its minimal and much less time consuming. All in all NASA Night Launch is very good and likely the best out there.

This review is for a previous version of the add-on (0.6.20121209).