I have the same setup, but the W’s are faded on my screen.
Thank you all for proving I am not crazy!
In Googling further, this does seem to be a new Firefox issue, something with certain fonts not showing up well, specifically the “w”, and appearing to be faded.
I’m pretty sure it has something to do with the w-boson. Perhaps it’s becoming ever weaker?! LHC… what are you guys up to?!