Rated 5 out of 5 stars

Here are the screens to show the difference in the tab loading:
As you can see the loading icon on the left is different and the progress bar does not go through the middle of the tab.

Also the options pages have quite a different colour scheme from before:

And also the menus:

This review is for a previous version of the add-on (1.1.1).  This user has other reviews of this add-on.

difference in the tab loading
Are you using some special addon like fission? Try v1.1.2 I changed something on tabs, maybe this is fixed for you.

"options pages have quite a different colour scheme"
Thats right, I used some code from Nuvola. Maybe I look at it someday but is this really a big problem? Noia 4 is not a Noia eXtreme clone for FF4 so it may have some different settings. ;-)

"And also the menus"
Thats strange. That bug was fixed before I released Noia 4. I do not have this bug neither on Win7 nor on XP. Can you provide some more specs from your system and you firefox. Are you using Linux/Mac OS?