Contrast + Theme Add-on change

[GreyMoth]

As of 12/9/25, Firefox seems to now prevent Theme add-ons from working if there is a contrast setting configured in Windows configuration. (Version 146.0)
Previously, this allowed a very aesthetically pleasing view. I would greatly enjoy having that option again.
Thank you.

Idea/enhancement request opened based upon Mozilla Support discussion.

[Jon]

Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.

[ScienceD]

I really need this fix too!
Just look at what my previously perfectly black (no white borders) tab bar have become with your new update:

 None of the themes are working!
I can't disable High Contrast theme in Windows, since it is the only way to make Windows 10 to be in a true dark mode!