Use these tools to find out more about the computer you are using.
Browser and Operating System
HTML5test lists the browser version, operating system, and capabilities of the browser.
Which browser determines the browser version and the operating system more precisely.
Adobe Flash Player
The Adobe Flash Player About page shows you your Adobe Flash version and the latest version available.
The Adobe Flash Player Help page tests your version of Adobe Flash and provides an animation to demonstrate functionality.
Java
The official Verify Java Version page can test if you have Java and if it’s the latest version
Adobe Reader / PDF
Mozdev.org provides an embedded PDF test page to verify your document viewing software is working.
Other plugins
Mozdev.org also offers additional test pages for TIFF, JPEG2000, and Windows Media Player.
Mozilla Firefox has a Plugin Check & Updates page which covers Flash Player, Reader, Java, Silverlight, VLC and others.