Browser Check

One line that says whether your browser is current

It reads the browser and version a visitor is on, compares that against the official current stable release, and says either that they are current or that an update is available. It does not diagnose vulnerabilities or hand out a score. It does not probe features or enumerate plugins, and the only request that leaves the page fetches the version table. The comparison happens inside the visitor’s browser. If the browser cannot be identified, or the table cannot be fetched, the widget renders nothing at all. An empty slot beats a wrong "update your browser".