Firefox - Show Scrollbars

If you find it frustrating that the scrollbars hide and disappear from you in Firefox, you can disable this by following the steps below:

Steps

Enter the following into the browser URL bar:

about:config

Accept the risk and continue when you see the following screen:

Search for "overlay-scroll" to find the option "widget.gtk.overlay-scrollbars.enabled" and set it to false.

Your scrollbars should now always be easily visible as shown below: