AccessibilityPlus от kgsensei

Do you have a hard time reading text on websites?

With this simple, easy to use Firefox extension you can edit the background color, text color, link color, font size, and font family to make it easier to read! It comes with a few tested presets too!

In all seriousness, reading text on some websites can be very hard for dyslexic people or elders, this extension was designed to make life easier for you.