Limitations

• Platform availability: Browser use is available on the Claude API and Google Cloud.
• Whole-input streaming only: When you stream, each member's input arrives as one complete input_json_delta (Client toolsets).
• Element references are best-effort: Highly dynamic pages (virtualized lists, canvas-rendered interfaces, pages that re-render on scroll) might not expose stable references, and Claude falls back to screenshots and coordinate clicks there.
• read_console and read_network depend on your browser automation: They report only what it can capture, and only from the moment it attached to a tab.
• General agent limitations apply: Latency, vision accuracy, and prompt-injection risks carry over from computer use (see the computer use tool's Limitations), and its guidance under Optimize model performance with prompting, Manage screenshot history, and Follow implementation best practices (action delays, action validation, and logging) applies to browser executors too.