Principle:Puppeteer Puppeteer Browser Version Verification
| Knowledge Sources | |
|---|---|
| Domains | Browser_Automation, Testing, Diagnostics |
| Last Updated | 2026-02-11 23:00 GMT |
Overview
A diagnostic technique that queries a running browser instance to determine its name and version string for verification and debugging purposes.
Description
Browser Version Verification retrieves the browser's self-reported version string. This is useful for:
- Confirming which browser and version is actually running
- Debugging cross-browser issues by identifying the exact build
- Verifying that browser installation and launch succeeded
- Logging browser information for test reports
The version string format varies by browser: Chrome reports as "HeadlessChrome/61.0.3153.0" or "Chrome/61.0.3153.0", while Firefox reports as "Firefox/116.0a1".
Usage
Use this after launching a browser to verify the correct browser and version are running, especially in cross-browser testing scenarios or CI environments.
Theoretical Basis
The version is retrieved via the browser's protocol connection, querying the browser's built-in version reporting mechanism.
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