How to remove the close button from your tabs in Firefox

Do you use Mozilla Firefox?

Do you hate the presence of the close buttons on tabs?

Do you want to hide the close buttons on tabs? 

I really do.  I use Tree-style view and they waste a bunch of space.  Stupid close buttons!  So, go to about:config, filter for the property browser.tabs.closeButtons, and change its integer value from 1 to 0.  This way, it will only display the close X button on the tab you are on.

Yay!