The Mozilla developers introduced the Mozilla Plugin Check back in October 2009 as a way to inform users of the Firefox web browser about outdated plugins. Plugins that are not up to date can pose both a security and stability risk.
The plugin check would analyse the plugins of the web browser and compare their version to the latest version offered by the plugin’s developer to inform the user if the plugin is up to date or needs updating.
This plugin check has now been extended by the developers to work with other web browsers as well making it a web tool for everyone who wants to verify that the installed plugins are up to date.
All that needs to be done to check the installed plugins is to visit the plugincheck website to do so.
Via | ghacks