The culprits, Avast Online Security, Avast SafePrice, AVG Online Security, and AVG SafePrice, were found to be unnecessarily collecting vast amounts of data about users’ browsing history.
Wladimir Palant, creator of AdBlock Plus, first broke the news back in an October blog post, but reported the violations to Mozilla and Google just last week.
By examining network traffic, Palant learned that the free antivirus solutions were transmitting users’ browsing history, visited URLs, frequency of website visits, and operating system versions.
Since then, Avast said that it was working with Mozilla on updating its add-ons.
Mozilla responded to the news by removing the problematic extensions from its add-on store. However, Mozilla has not blacklisted the extensions, confirming that they are still talking to Avast.
Meanwhile, the extensions are still live on Chrome. Google has yet to make a statement on the matter.