Background in option windows Rated 4 out of 5 stars

Thanks for the update.
I think that the background color in option windows for the gray version is not good. In Noia2 3.76 it's a specific gray for simple windows or a graduated gray background for windows with tabs. In Noia4, it's the standard default theme background in any case for the gray version, though it's better in blue or dark versions.
Secondly, the tabs were rounded in Noia2 3.76, here they are not.
Nevertheless, good job.

Gd_on

This review is for a previous version of the add-on (1.1.7). 

You can set round tabs in Noia4 options. Noia 2 had this as an options too and not as default set.

You were right about the gray. It was the wrong one. Fixed on v1.2.4.

"or a graduated gray background for windows with tabs" -> there are changes on FF4. That doesn't work anymore like it did in FF3.