Fira Sans font not loading

[vankesteren]

I've been receiving some notifications that firatheme does not work as intended for some users. This seems to be mainly on windows. Upon first use, the firatheme package shows the following error when loading the Fira Sans font:

Extracting .afm files from .ttf files...
C:\path\to\fonts\FiraSans-Bold.ttf : No FontName. Skipping.
C:\path\to\fonts\FiraSans-BoldItalic.ttf : No FontName. Skipping.
C:\path\to\fonts\FiraSans-Italic.ttf : No FontName. Skipping.
...
Found FontName for 0 fonts.

This is a known issue with a dependency of the extrafont package used to import the fonts. A workaround is installing a previous version of this package using the remotes package with the following code:

remotes::install_version("Rttf2pt1", version = "1.3.8")

See also the following issues:

• No FontName - ttf2pt1.exe had status 1 wch/Rttf2pt1#10
• Correctly finds font directory, but says "No FontName. Skipping" for all fonts wch/extrafont#88
• No Fontname. Skipping, for all of my fonts in Windows? wch/extrafont#76

I can't really do anything about this right now, let's hope that the dependency gets fixed at some point!

[vankesteren]

On mac, a solution is to just install Fira Sans in the font book.