My impression is that firmware follows w3c. Strict rules
might be tricky from time to time. Font has to be defined
in css and not in body definition. There was a difference
for html and xml eon ago, when I was interested on the
topic. Also, font itself has to be included.
The point is: new firmware should look for font definition
in all parts of css. Would they to that? I assume they are
aware of possibility to add new proprietary font.
Some people, like me, do not give a dime over this. Some
find it the most distracting feature. We'll see what will