CobaltCapture

What's my user agent?

The metadata QA people copy into every bug report. Pulled from your browser, never leaves your browser.

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Browser
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Operating system
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Device type
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Language
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Why this matters for a bug report

A reproduction that works in Chrome on Mac and breaks in Safari on iOS is a different bug from one that breaks everywhere. The user-agent fields are the cheapest possible metadata to capture and the most expensive to lose. Without them, every triage starts with "what browser were you on?"

The fields most bug reports want

  • Browser name and version (Chrome 132, Safari 18.1, Firefox 134)
  • Operating system and version (macOS 15.2, Windows 11, iOS 18)
  • Device type (desktop, tablet, mobile)
  • Viewport size at the time of the bug, see what's my viewport

For the full workflow of writing a bug report a coding agent can act on, see markdown bug reports for AI coding agents.

Writing a bug report?

Cobalt Capture stamps the browser, OS, viewport size, and source URL onto every screenshot you publish, so the bug report is complete the moment you hit save. No install. Free.

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