---
title: "Scalebrowser Blog, page 3"
description: "Guides and measurements for teams whose AI agents drive a real browser: detection, captchas, sign-ins and infrastructure."
canonical: "https://scalebrowser.net/blog/page/3"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://scalebrowser.net/llms.txt
> Use this file to discover all available pages before exploring further.

# Scalebrowser Blog, page 3

> Guides and measurements for teams whose AI agents drive a real browser: detection, captchas, sign-ins and infrastructure.

- [Slider captcha: measure the gap instead of guessing](https://scalebrowser.net/blog/slider-captcha.md): How an AI agent solves a slider captcha by measuring the gap first: GeeTest v3 at 112 pixels in one drag, GeeTest v4 in 2 of 2 runs, the rotation variant not at all.
- [Playwright storage state: what a persistent profile keeps](https://scalebrowser.net/blog/session-persistence.md): What Playwright's storage state saves in 2026, the 4 things a restored state still lacks next to a persistent profile, and how a session moves between machines.
- [Permission prompts in automation: 14 kinds a browser draws](https://scalebrowser.net/blog/permission-prompts.md): Why automation cannot see Chrome's permission prompts, which 14 kinds a browser draws beside the page, and which 3 an AI agent should never answer.
- [Font fingerprinting: 130 of 187 fonts drawn but not listed](https://scalebrowser.net/blog/font-fingerprinting.md): Font fingerprinting compares the fonts a browser lists with the fonts it draws. Our persona list left 130 of 187 families unlisted; voices follow the same rule.
- [AI job applications: Workday wants an account by step 3](https://scalebrowser.net/blog/ai-job-applications.md): What an AI agent meets when it applies to jobs: we opened real postings on Greenhouse, Lever, Workday, LinkedIn, Indeed and Upwork and counted every step.
- [Directory submission: 100 sent, 32 live, 9 followed links](https://scalebrowser.net/blog/directory-submission.md): We collected 1,166 directories and lists, dropped 597, and let an AI agent submit 100. Which entries went live, which links count and what it cost.
- [Temporary email for verification: 1 address per profile](https://scalebrowser.net/blog/email-verification-codes.md): Why temporary email fails for agent sign-ups, and how a catch-all domain gives every profile 1 address of its own, read outside the browser within 60 seconds.
- [Facebook Marketplace API doesn't exist: find deals anyway](https://scalebrowser.net/blog/facebook-marketplace-api.md): Facebook Marketplace has no public API for buyers or sellers. What an AI agent does instead: search, watch for deals, list items, and what a visitor sees signed out.
- [Instagram MCP: post and reply with an AI agent, no API](https://scalebrowser.net/blog/instagram-mcp.md): What an Instagram MCP server can do: the official API covers professional accounts only, 100 posts in 24 hours, and a signed-in browser covers any account.
- [LinkedIn MCP: let an AI agent work LinkedIn without the API](https://scalebrowser.net/blog/linkedin-mcp.md): How an AI agent works LinkedIn through an MCP server: what the official API allows, what a browser signed in as you reaches, and what we measured.
- [Market research AI misses Reddit and X: 0 of 7 links read](https://scalebrowser.net/blog/market-research-ai.md): Why AI deep research misses Reddit, X and LinkedIn, and what an agent in a browser signed in as you reads instead: 4 of 4 Reddit threads in our test.
- [Midjourney API: why every one you find is unofficial](https://scalebrowser.net/blog/midjourney-api.md): Midjourney grants an API only in rare cases. What the unofficial APIs are, how an AI agent works the Midjourney website, and what we measured on 11 October 2026.

Page 3 of 7. Previous: [page 2](https://scalebrowser.net/blog/page/2.md). Next: [page 4](https://scalebrowser.net/blog/page/4.md).