Add BrowserTrace to browser interaction tools

[aaronlab]

Adds BrowserTrace to the Browser Automation category.

BrowserTrace is an open-source local debugger for AI browser-agent runs. It records failed Browser Use, Stagehand, Skyvern, Playwright + LLM, and custom computer-use runs as step timelines with screenshots, URLs, actions, model I/O, status, errors, and public-safe HTML exports.

I kept the listing narrow because this directory has a strict agent-first bar. If this reads as adjacent devtooling rather than agent-first browser tooling, I am happy to adjust or close it.

Validation run locally:

• npm test -> 28 passed
• npm run validate:content -> Content validation passed for 13 categories and 24 tools
• git diff --check -> clean

[github-actions]

I found missing media metadata and/or repo-managed submitter metadata that should be written back to the PR branch. I can't push directly to forked PR branches, but you can generate the same changes locally with:\n\nbash\nnpm run sync:tool-submitters -- --submitted-by "aaronlab" \nnpm run enrich:tool-assets -- --write \n\n\nThen commit the updated files to this PR branch.

[aaronlab]

Updated this PR branch with the generated BrowserTrace metadata requested by the enrichment workflow.

Local verification:

• npm run sync:tool-submitters -- --slug browsertrace --submitted-by aaronlab
• npm run enrich:tool-assets -- --slug browsertrace --write
• npm test -> 28 passed
• npm run validate:content -> content validation passed
• git diff --check -> clean

The latest Enrich Tool Assets run is passing: https://github.com/bradvin/agentfirst.directory/actions/runs/25617262079