Sometimes when I open a new tab on the current version of Firefox (under Windows 10) and go to the lichess site, the graphics of some of the pieces appear somewhat broken on all boards, the small ones and on the large board when playing. For example, parts of some pieces are transparent or are black instead of white. I could provide a screenshot if that helps.
Since this does not happen always, and closing and restarting the brower solves the issue, it's not a big deal, and probably not even a lichess bug.
I was just wondering if someone has experienced the same problem and might have an explanation.