Avast explains how it has been monetizing browsing habits of its users since 2013, after Mozilla and Opera removed some Avast tools from their add-on stores (Thomas Brewster/Forbes)

Thomas Brewster / Forbes:
Avast explains how it has been monetizing browsing habits of its users since 2013, after Mozilla and Opera removed some Avast tools from their add-on stores  —  Avast, the multibillion-dollar Czech security company, doesn't just make money from protecting its 400 million users' information.