If you want some privacy when it comes to Web browsing, most browsers offer private modes that don't track the sites you visit. It's not foolproof, though, so Mozilla is working on a version that gives the user more control.
Mozilla's updated Private Browsing "actively blocks website elements that could be used to record user behavior across sites," the company said in a blog post. "This includes elements like content, analytics, social, and other services that might be collecting data without your knowledge."