I've been using Firefox for many years. In the settings, under Accessibility, the website contrast option has "Automatic," "Off," and "Custom," but currently, only "Custom" allows users to customize the color scheme.
To change the color scheme with "Automatic" or "Off," you need to use an add-on. However, with Firefox's specifications changing, it's uncertain how long these add-ons will remain usable. Therefore, even if accessibility is set to "Automatic" or "Off," wouldn't it be better to allow users to freely customize the color scheme?