It doesn't check for code vulnerabilities, but for configuration options and security mechanismsLucian Constantin (IDG News Service) 27 August, 2016 01:14
In order to help webmasters better protect their websites and users, Mozilla has built an online scanner that can check if web servers have the best security settings in place.
Dubbed Observatory, the tool was initially built for in-house use by Mozilla security engineer April King, who was then encouraged to expand it and make it available to the whole world.