The term was coined and researched by security researcher Sam Jadali, he discovered eight such browser extensions that harvested over 4 million Firefox and Chrome users data. These extensions collect personal and corporate data in real-time, that includes personally identifiable information (PII) and corporate information. Google, Mozilla, and Opera, they are to remotely disable the identified extensions. The data is collected by eight invasive extensions, including Hover Zoom, which is recommended to remove them. All extensions are running on the operating systems running the operating system running the extensions.”]
Source: https://gbhackers.com/dataspii-browser-extensions-steals-data/