# Collin Pfeifer
URL: /cookbook/authors/aspectrr

---
title: Collin Pfeifer
description: 3 recipes contributed to the Steel Cookbook by Collin Pfeifer.
---

<AuthorProfile handle="aspectrr" name={"Collin Pfeifer"} avatar="https://github.com/aspectrr.png?size=40" />

<RecipeGrid>
<RecipeCard slug="profiles" title={"Persist authenticated sessions with Profiles"} description={"Maintain authenticated sessions across Steel browser instances using profiles."} topics={['Steel APIs', 'Authentication']} date="2025-10-13" />
<RecipeCard slug="magnitude" title={"Build an AI browser agent with Magnitude"} description={"Use Steel with Magnitude for AI-powered browser automation."} topics={['Agents']} date="2025-07-30" />
<RecipeCard slug="extensions" title={"Upload and run browser extensions"} description={"Use the Steel Extensions API with Playwright to upload and run browser extensions."} topics={['Steel APIs', 'Playwright']} date="2024-11-19" />
</RecipeGrid>