Upgraded from 8 to 9.1.6 (enterprise) several days ago. At one point shortly after updating I seem to recall finding myself in light mode, thought "oh it reset," and switched back to dark. Today dark mode doesn't seem selectable? Meaning, I can pick it, and Apply, and shift+reload the page, and repeat, and I still get the default/light mode:

If I open a private window in the same (Firefox) browser I can change modes. It doesn't look like there are any cookies to delete. Thoughts?

If I open a private window in the same (Firefox) browser I can change modes. It doesn't look like there are any cookies to delete. Thoughts?