The Tab bar is the toolbar that displays your open tabs:

 

 

By default, the tab bar is hidden. It only appears when a new tab is opened.

You do have the option of having the tab bar visible at all times. If you’d like to try this option out, go to the top of your browser and click Tools > Options:

 

 

Make sure that you are in the “Tabs” section.

Click on the box labeled “Always show the tab bar”:

 

 

Click “OK,” and the tab bar will now be visible at all times.

To go back to the default, just uncheck the box labeled “Always show the tab bar.”