Ease Eye Strain & Stress Rated 4 out of 5 stars

Simple Effective Addon that Always Works:
Toggle your custom colors on, toggle off to restore the page's original colors.
Ease Eye Strain and Stress; Change colors that bug your eyes, OR trigger PTSD like red can...
The only con is that links will appear red as you hold down right click.

This review is for a previous version of the add-on (0.13.1-signed.1-signed).