Click the menu -> your username -> youremail@email.com -> Sign Out

You can also do this via the Firefox Account button on the Navigation Toolbar and via "Options/Preferences -> Sync".

There is neither a Sign Out option when I click my email, nor a choice to do so from the Sync. This is the crux of my problem! I have seen both of these options on other machines I use/sync my account on, but not on one particular machine. It's weird. Any suggestions beyond uninstalling the program?

What do you see on "Options/Preferences -> Sync" ?

Does it say that you are logged in ?

Pretty much everything but a choice that allows me to log out. I'm going to just reinstall the browser. I thank all for their assistance.

Is the screen width enough for all content (i.e. does going to full screen or zoom out the page via "Ctrl + -" make a difference) ?