Researchers at Awake Security told Reuters that hundreds of Chrome browser extensions were found to be malicious. Most of the free extensions purported to warn users about questionable websites, or to convert files from one format to another. Instead, these Chrome extensions sucked up browsing history and data that provided credentials for access to internal business tools.
Based on the number of downloads, it was the most far-reaching malicious Chrome store campaign to date.
Google removed over 100 Chrome browser extensions from the official Web Store.
Read more about it here.