Remove Annoying Overlays
I discovered a great feature of the Firefox NoScript add-on.
This trick is good for removing overlays that reduce and interfere with reading space.
A similar option I long have used is the Read Easily add-on. With a single click or keyboard shortcut, the web site’s CSS is disabled, thereby exposing the text and graphics without any layout.
Another option to improve readability is using the built-in Firefox Reader.