According to multiple reports, Web of Trust, one of the top privacy and security extensions for web browsers with over 140 million downloads, collects and sells some of the data of its users — and it does without properly anonymizing it. Upon learning about this, Mozilla, Google and Opera quickly pulled the extension off their respective extension stores. From a report on The Register: A browser extension which was found to be harvesting users’ browsing histories and selling them to third parties has had its availability pulled from a number of web browsers’ add-on repositories. Last week, an investigative report by journalists at the Hamburg-based German television broadcaster, Norddeutscher Rundfunk (NDR), revealed that Web of Trust Services (WoT) had been harvesting netizens’ web browsing histories through its browser add-on and then selling them to third parties. While WoT claimed it anonymised the data that it sold, the journalists were able to identify more than 50 users from the sample data it acquired from an intermediary. NDR quoted the data protection commissioner of Hamburg, Johannes Caspar, criticising WoT for not adequately establishing whether users consented to the tracking and selling of their browsing data. Those consent issues have resulted in the browser add-on being pulled from the add-on repositories of both Mozilla Firefox and Google Chrome, although those who have already installed the extension in their browsers will need to manually uninstall it to stop their browsing being tracked. Read more of this story at Slashdot.