I use something called Dark Reader.
https://darkreader.org/
Me too, I often highlight by left clicking my mouse button, and drag the blue screen over the entire thread. It is irritating, but it helps my eyes.
I use Samsung’s default browser. Dark background on Freerepublic.com....
What browser are you using? There is an extension for Chrome called Dark Reader that can do it for you.
Use the Brave browser and select the Dark setting in Appearance. For desktop you can just create a solid black image sized 3840x2160 or whatever you have your display resolution set at.
I see you’ve found a solution, but once more for old times sakes: Are you logged in?
:^)
Get your cataracts fixed. I did and it worked like a charm.
Just the lenses none of that fancy shirt.
It completely fixed my contrast problems.
Type "High Contrast" in the "Type here to search" on your Task Bar.
Select "Turn High Contrast On or Off"
Toggle "Turn High Contrast On"
Or... Press the left Alt Key, the left Shift Key, and the Print Screen key at the same time. A pop-up will appear asking if you want to turn on High Contrast.
If it's just for a browser, each has a way to turn it on. For example in Firefox:
Tools
Settings
Type "Colors" in the "Find in Settings" box at the top
Manage Colors
Text (select white or lighter color)
Background (select black or darker color)
Uncheck "Use system colors"
Click on "OK"
My advice to you is to see an ophthalmologist if you are on Medicare (or wait until you are shortly). They will confirm the cataracts and help you schedule to have them removed. There is no cost for this if you have Medicare and supplemental insurance. A simple procedure spread by about two weeks for each eye and improvement is fantastic.
A white background? Dat be rayciss!