Page view not showing up in firefox (works in chrome)

The text in page view appears to be covered by some sort of box that I cannot close when using firefox. It does not go away when I disable my extensions or use incognito mode. Sentence view seems to work fine in firefox, and everything works well in chrome. I prefer page view to sentence view, and I don’t really want to have to use chrome specifically for this. Does anyone know how to fix this?

We are investigating the issue, thanks for reporting.