Firefox tabs

for the longest time I had been using Firefox version 3. I know that's way old, but I was comfortable with it.
I just upgraded to Firefox version 15.
is there a way to move where the tabs are? in version 3 the tabs would be underneath the bookmarks toolbar. I think in every version since 3 the tabs are at the very top of the page above the address/navigation bar.
I don't really like a lot of the changes and the way it looks, and maybe feel like switching back to the old dirt version 3. I never had any trouble/problems using 3. gmail would tell me I'm using an older version and some features might not work, but my gmail always worked good enough for me.

 

FireFox with Menu Bar showing
Click on View > hover over Toolbars
Tabs on Top will be ticked, click on it to un-tick and move the tab bar

FireFox with Menu Bar hidden
Click on the Menu (FireFox logo top left) > hover over Options
Tabs on Top will be ticked, click on it to un-tick and move the tab bar

 

Greetings, SpecialFNK...

FWIW, the attached shows how my tabs are looking with FF 16.0:
.

 

Type about:config in the address bar and hit enter. Press "I'll be careful" on the warning dialog page. Find this preference: browser.tabs.onTop. Double click it to change it from TRUE to FALSE.

The above is if you want the tabs below the address bar.

 

What theme is that Caliban? I like it.

 

Glass - Black.

 

Thank you.

 

thank you for helping everyone.
I also like this theme. I didn't know you could do this, but I like this a lot better than seeing my desktop background at the top of the page.