My Firefox is showing up using the Windows XP (green buttons) skin. On Help-About, it says:



On my brother's his uses the Vista (blue buttons) skin, his (which is just updating) says:



The noticeable difference for me here, is that mine says I'm using Windows NT 5.1, and his is using Windows NT 6.0.


As far as I am aware, both PCs are virtually identical. What's going on here?

This is because Windows 5.1 = Windows XP and Windows 6 is Windows Vista. Windows 7 happens to be Windows 7.

You can see the Windows version by right clicking My Computer / Computer and clicking on Properties.

I worked that part out myself. What I want to know is why my Firefox thinks it is running on XP, as both mine and my brother's PCs are running on Vista.

@Aaron. Windows 7 is Windows 6.1
@Met. Disable your descriptoranimal (Ninjaturtle or whatever) addon to see if that fixes it

That addon is not installed on this PC. It never has been.

I do believe Windows 7 final is becoming Windows 7.

I have fixed it.

First, I ran Firefox in safe mode with all addons disabled. It was the Vista theme. Then I ran it in safe mode with the addons not disabled. It was the Vista theme.

Then I loaded up Firefox normally and it is now running the Vista theme.

It also says in Help-About:



I have no explanation.

Crazy addon power!

As for Win7, I thought the point was that it would be version 7

I've got the same addons running that I had before.

It downgraded you to a Vista version instead of an XP version?

Other way round.

No No i think that was quite deliberately written that way.

I'm well aware of that, and I was quite deliberately correcting him.