In one of my earlier post on opening a new tab in Firefox,I demonstrated how to use a double click within the browser to launch a new tab.
Just like many things in technology,there are other ways of getting the same result.
If you want to launch a new tab in Firefox without a keyboard shortcut,simply double click on the blank area next to an open tab.
This will launch a new blank tab in Firefox,keep repeating the procedure to open as many tabs as needed.It is fast too!
Hope it has been an informative post.