Chrome snoop-apps banned by Google
These small extensions can be helpful additions to Chrome and Firefox when it comes to browsing, but some of them were problematic when you get under the hood of them. Google teamed-up with the University of California to analyse and nix a number of these apps.
They found that 5% of everyone visiting a Google page have at least one malicious extension, and most of those have a number of add-ons which are malicious.
One of the problems, according to researcher Alexandros Kapravelos, is that the dodgy extensions use the same techniques to collect your data as the legit ones.
"Even when we have a complete understanding of what the extension is doing, sometimes it is not clear if that behaviour is malicious or not," he said. "You would expect that an extension that injects or replaces advertisements is malicious, but then you have AdBlock that creates an ad-free browsing experience and is technically very similar."