"Fira Code" is a font which helps the readability of your code. This is how you install it on VSCode.

• Firstly, install the font: You can run the following command on mac or visit this post on github for other OS.

brew tap homebrew/cask-fonts
brew cask install font-fira-code

• Edit thesettings.json file in VSCode

//settings.json
{
  //...
  "editor.fontFamily": "'Fira Code', Menlo, Monaco, 'Courier New', monospace",
  "editor.fontLigatures": true
}

• Other ways and more options visit this post here