BrowserLeaks.com is a website that analyses your current browser setup and tells you what information it could find. It then gives you advice about how to improve/fix the leaks. Your web browser gives away information that could be personally identifiable. You probably heard about cookies and IP addresses, but there's a lot more besides: geolocation, unique font collections, screen resolutions, battery status, operating system and version, local IP addresses, browser plugins, unique hardware identification numbers, and many other things... even the pattern you use to type. This info can be combined to uniquely identify you online and track your activities, violating your privacy. That information can be used for many different purposes, from censorship, to identifying political activists and human rights campaigners, to selling your personal information to advertisers. There are a number of browser-related technologies and attributes that BrowserLeaks tests. These are:

• IP address
• Javascript
• Flash player
• Silverlight
• Java applet
• WebGL
• Canvas fingerprint
• WebRTC
• Content filters
• System fonts
• Geolocation
• Do Not Track settings The website then offers you further advice, usually through links to further reading about settings you could change in your browser, or plugins you could install to reduce the amount of personally-identifying data your browser is leaking about you. The website is both referred to and complements other privacy-advice related websites, including privacytools.io and the Electronic Frontier Foundation's Panopticlick.