Edit the windows registry to set fira sans as the font instead of Segoe UI
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts]
"Segoe UI (TrueType)"=""
"Segoe UI Bold (TrueType)"=""
"Segoe UI Bold Italic (TrueType)"=""
"Segoe UI Italic (TrueType)"=""
"Segoe UI Light (TrueType)"=""
"Segoe UI Semibold (TrueType)"=""
"Segoe UI Symbol (TrueType)"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes]
"Segoe UI"="Fira Sans"
Fira-sans-Windows - Change Windows System font to Fira Sans
1 Download Fira-Sans from Google Fonts and install https://fonts.google.com/specimen/Fira+Sans
2 Run the script
3 Restart your machine