I'm working on documenting some Python code with Sphinx and the Read the Docs theme. This theme uses a couple of Unicode "private use area" characters - U+F015 (house) and U+F06a (exclamation mark in circle).
These characters are not rendering when I use Firefox to view my locally generated documentation (although they *are* rendered when I view RTD documentation online). These characters render just fine in Google Chrome, LibreOffice Writer, and KCharSelect, so I don't believe that I'm missing a font.
Anyone have any idea what might be going on?