Create supported-fonts.mdx (#24917)

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Author: kathayl

src/content/docs/browser-rendering/reference/supported-fonts.mdx

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+---
+pcx_content_type: reference
+title: Supported fonts
+sidebar:
+  order: 3
+---
+
+Browser Rendering uses a managed Chromium environment that includes a standard set of fonts. When you generate a screenshot or PDF, text is rendered using the fonts available in this environment. 
+
+If your webpage specifies a font that is not supported yet, Chromium will automatically fall back to a similar supported font. If you would like to use a font that is not currently supported, reach out to us on [Cloudflare Discord](https://discord.cloudflare.com/).
+
+## Generic CSS font family support
+
+The following generic CSS font families are supported:
+
+- `serif`
+- `sans-serif`
+- `monospace`
+- `cursive`
+- `fantasy`
+
+## Common system fonts
+
+- Andale Mono  
+- Arial  
+- Arial Black  
+- Comic Sans MS  
+- Courier  
+- Courier New  
+- Georgia  
+- Helvetica  
+- Impact  
+- Lucida Handwriting  
+- Times  
+- Times New Roman  
+- Trebuchet MS  
+- Verdana  
+- Webdings
+
+## Open source and extended fonts
+
+- Bitstream Vera (Serif, Sans, Mono)  
+- Cyberbit  
+- DejaVu (Serif, Sans, Mono)  
+- FreeFont (FreeSerif, FreeSans, FreeMono)  
+- GFS Neohellenic  
+- Liberation (Serif, Sans, Mono)  
+- Open Sans  
+- Roboto  
+
+## International fonts
+
+Browser Rendering includes additional font packages for non-Latin scripts and emoji:
+
+- IPAfont Gothic (Japanese)  
+- Indic fonts (Devanagari, Bengali, Tamil, and others)  
+- KACST fonts (Arabic)  
+- Noto CJK (Chinese, Japanese, Korean)  
+- Noto Color Emoji  
+- TLWG Thai fonts  
+- WenQuanYi Zen Hei (Chinese)