I have tabs on top selected in Firefox version 4. Originally, the tabs were in the title bar (between the orange Firefox button and the minimize, maximize, close buttons) but after I removed the open bookmark button from the navigation bar, the tabs are now below the title bar and I cannot get them back up on the title bar. Putting the open bookmark button back on the navigation bar did not do it. How do I get them back there?
You can check the pref browser.tabs.drawInTitlebar on the about:config page.
To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website.
If you see a warning then you can confirm that you want to access that page.
I resolved it. Firefox took up the entire screen but was not maximized. When I maximized Firefox, the tabs were in the titlebar. Thanks for pointing me in the right direction (I Googled drawInTitlebar).
If you maximize the Firefox window then you can get the Tabs in the title bar if you set the above mentioned pref browser.tabs.drawInTitlebar to true.