Websites That Used To Allow For User's Background Color No Longer Do w/ Latest Firefox Updates

[Jimmy001]

As an example "healthline dot com" & "zerohedge dot com" would automatically obtain the user's background color (BC) selection (i.e., #cccccc) & implement that as their BC, same as MS Edge, but now, after Firefox's 138.0.1 Update, no longer do. This is not fair at all, for user's that rely on this feature, for their eye health, overall health, for their enjoyment & their experience. Please fix this, & return it to "normal", the way it used to be. Now all of these websites have a "forced white background", & nothing can change that except the very boring, unappealing, & extreme of the binary "dark theme".

[siffemcon]

Play with the settings at FF menu > General > Contrast Control.

[Jimmy001]

In the [Off] position it should work the way I describe, where a webpage (if properly designed - as the 2 examples I provided) should automatically use the [user's background color selection] (UBCS), & that's the way FF (Firefox) used to work. It was working perfectly until Firefox's 138.0.1 Update, where they introduced this [Contrast Control] & screwed everything up, w/ a [forced white background]. The [Custom] selection is like a "shotgun" approach (or better yet, a "hack"), where everything changes to the background color, including other colored areas that should not change to the UBCS, but they do, & so it looks horrible. So, that is not the solution,...

[siffemcon]

Play with the values in about:config > layout.css.prefers-color-scheme.content-override

Dark (0), light (1), system (2) or browser (3)

[Jimmy001]

I tried them all, but unfortunately it didn't change a thing.