How to change the font of Visual Studio Code's UI?

Visual Studio Code does not offer convenient solution out of the box to change the UI font family.

But a developer created the Customize UI plugin for VS Code.

Setup

1. Install the Customize UI plugin
2. Restart VS Code
3. Open VS Code Settings
4. Change Customize UI Font:Monospace to Fira Code
5. Change Customize UI Font:Regular to Helvetica Nueve or Arial depending on your OS

Alternativaly, you can edit those settings using the json settings editor as follow:

    "customizeUI.font.regular": "Helvetica Nueve",
    "customizeUI.font.monospace": "Fira Code",

GitHub issue here