User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:73.0) Gecko/20100101 Firefox/73.0

Steps to reproduce:

Firefox 71.0 on my computer replaced with 73.0.1 and now annoying light colored bands appear in numerous places on numerous web sites.
I am using a Windows 7 Dell desktop.

Actual results:

Screen image is changed to something that is painful to look at due to my vision issue.
I reinstalled 71.0 and it was forcibly and without my permission upgraded to 73.0..1. I specifically checked "do not update" in options.
In any case, I had saved a screen shot of an example web page with 71.0 and again with 73.0.1 (attachment). I also included a screen shot of my color settings. My wife finds them funky and painful, but for me, they work well.
The light bands are very distracting as I am colorblind and sensitive to light and prefer a more muted background.
I should note that using a high contrast color scheme is a poor choice because so many web sites to not work correctly with it.

Expected results:

Nothing. The program should have continued to behave as before.
Thanks for listening.

1. Enter about:config into the address bar.
2. Bypass the warning.
3. In the search bar, enter browser.display.permit_backplate
4. In the search results, double-click browser.display.permit_backplate to set it to false.

Duping to bug 1614921 based on the screenshot. Additional cases should be covered by bug 1617678 and bug 1617681.