Finally. Rated 5 out of 5 stars
This really is a great addon, as an across-the-board solution for any site you visit has been (sorely) needed for some time. It surprised me how well it worked, really. For working anywhere it is effective without breaking too much on most sites I visit. Some elements of some sites will stubbornly have odd color schemes that might clash with your picked theme now and then.
So it's 90% good for most applications*, minus the occasional missed button or whatever. Easy to disable for a moment, though.
Overall, excited that I can read without my eyes burning. Many thanks.
*This comment kept being rejected as having errors in the form. As it turned out, my blackout setting of #000000 background made the rating markers invisible. Guess that's why it isn't in the default color themes as a choice.