How does my web browser pick which emoji font to use?

In: Emojis Across Platforms

By default the browser asks the OS for the system emoji font — so Safari on a Mac renders with Apple Color Emoji, Chrome on Windows renders with Segoe UI Emoji, etc. Websites can override this with CSS by shipping their own emoji font file (@font-face) or by using inline SVG replacements like Twemoji.js.

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