[Browser Run] Add accessibility tree endpoint docs

[AbdulsaboorS]

Summary

Adds Browser Run documentation for the new /accessibilityTree Quick Action endpoint.

Includes:

• New /accessibilityTree endpoint documentation page
• Browser Run release note entry
• Cloudflare-wide changelog entry
• /snapshot documentation update to link to the new single-format endpoint

Documentation checklist

• Is there a changelog entry (guidelines)? If you do not add one for something awesome and new (however small), how will our customers find out? Changelogs are automatically posted to RSS feeds, Discord, and X.
• The change adheres to the documentation style guide.

Validation

• pnpm run check
• pnpm run lint
• pnpm run format:core:check
• pnpm run build
• pnpm exec tsx bin/check-link-validation/index.ts

[cloudflare-docs-bot]

Review

🚨 1 critical found in commit 9d66ef1.

Code Review

This code review is in beta and may not always be helpful — use your judgment.

Critical (1)

File

Issue

changelog/browser-run/2026-07-06-browser-run-accessibility-tree-endpoint.mdx line 16

Incorrect REST endpoint path — The curl example uses /accounts//browser-run/accessibilityTree, but all other Browser Run single-format REST endpoints live under /browser-rendering/ (e.g., /browser-rendering/content, /browser-rendering/screenshot, /browser-rendering/markdown, /browser-rendering/snapshot). A request to the documented URL would 404. Fix: Change the curl URL path from /browser-run/accessibilityTree to /browser-rendering/accessibilityTree.

Conventions

_{No convention issues found.}

Style Guide Review

_{No style-guide issues found.}

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[AbdulsaboorS]

Addressed the docs bot feedback in the latest push:\n\n- Changed the changelog response fence from json output` to json.\n- Replaced clickable controlswithinteractive controls.\n- Also changed the new endpoint page response fences to plain ```json to avoid the same warning.\n\nLocal validation after the fix:\n- pnpm run check\n- pnpm run lint\n- pnpm run format:core:check\n- pnpm run build\n- pnpm exec tsx bin/check-link-validation/index.ts

[irvinebroque]

I am reading this still wondering, “what is an accessibility tree?”

[irvinebroque]

If this is useful for things beyond accessibility

(I think that’s what this is saying)

We need to say that more loudly

Otherwise I’d read this as a customer and see the word accessibility and just tune out unless that was something top of mind for me

[kathayl]

Suggested change

	With the new `/accessibilityTree` endpoint, you can request the accessibility tree directly when you only need the semantic structure of a page. If you need multiple page formats in a single API call, you can use the [`/snapshot`](/browser-run/quick-actions/snapshot/) endpoint, which also returned Markdown, HTML, and screenshots.
	With the new `/accessibilityTree` endpoint, you can request the accessibility tree directly when you only need the semantic structure of a page. If you need multiple page formats in a single API call, you can use the [`/snapshot`](/browser-run/quick-actions/snapshot/) endpoint, which also returns Markdown, HTML, and screenshots.