Fonts specified in 10-symbols.conf break the font if used in Firefox. Font renders as seemingly random symbols.

[QuentonP]

I have the following two fonts specified in my 10-symbols.conf file to use the awesome-terminal-fonts:

<fontconfig>
  <alias>
<family>FiraCode</family>
<prefer>
  <family>Pomodoro</family>
  <family>FontAwesome</family>
  <family>Octicons</family>
  <family>Icomoon</family>
</prefer>
  <alias>
<family>Roboto</family>
<prefer>
  <family>Pomodoro</family>
  <family>FontAwesome</family>
  <family>Octicons</family>
  <family>Icomoon</family>
</prefer>

If either of these fonts are set as one of the default fonts in Firefox, the fonts render as random symbols in Firefox. Not just the extra symbols, but regular letters and numbers too.

Elsewhere on the system, both fonts render fine, with the additional font symbols rendered as expected.

Not sure how to fix this. Is this an issue with Firefox or my 10-symbols.conf?