custom.css: Add "Fira Code" monospace font-family for code ligatures (#295)
custom.css: Add "Fira Code" monospace font-family for code ligatures (#295)


jgierer12/refined-github,busches/refined-github,busches/refined-github,sindresorhus/refined-github,jgierer12/refined-github,sindresorhus/refined-github