Firefox currently shows a drop-down list of the currently open tabs to the far right of the tab bar. Is it possible to keep this drop-down list, but hide the rest of the tab bar? I only want the tabs to be visible in this drop-down menu.
You can do this with the Tab Mix Plus extension. Right-click the menu bar and select Customize, drag the tab list button to where you want it (but not on the tab bar!) and close the Customize dialog. Go to Tab Mix Plus options and select Display (at the top) > Tab Bar (tab) > under Hide the Tab Bar select Always.