Does your Xperia have a "hardware menu button"? By that I mean, a button that is always available across all screen displays (sometimes it may dim or turn off, but you can tap it anyway). If so, use that button to call up the menu while viewing Firefox.

If not, look for a stack of 3 dots on the right end of Firefox's top bar, after the little icon with the count of currently open tabs. Can you find that?

No, the open website tabs button is the only item next to the the tab that I'm viewing with the Firefox. I just installed it so I don't have add-on yet.

Which Xperia do you have?

I have an Xperia arc S using android 4.04

Oh, hey, I used to have one of those! Nice screen.

The menu button is the third of the long, thin silver buttons along the bottom of the device. The menu icon looks like a long line with several shorter lines under it. In landscape mode, it's the top button.

http://www-static.se-mc.com/blogs.dir/0/files/2011/11/xperia-arc-s-mistysilver-620x440.png (bottom right)

http://www-static.se-mc.com/blogs.dir/0/files/2011/10/xperia-arc-s-blackblue-frontview-android-smartphone-940x529.png (top right)

That was one of the things I wasn't as happy about. Compared with the "touch" buttons on my HTC device, you have to press surprisingly hard on those silver buttons...

I appreciate your help. This phone is new to me so I have to learn the tricks. I'm able to run a sync with my desktop. So far this phone has yet to disappoint me.