On February 4, millions of browser tabs were
suddenly terminated. Not everyone was surprised; the dozen people who spent the last
four months waiting for this tragedy to occur watched in relief as the
first in a rapid stream of GitHub
comments began pouring in. The Great Suspender, a Chrome
extension that suspended inactive tabs,
with around two-million users, had been forcibly uninstalled because it contained
malware. This was a serious problem for users, in part due to the difficulty in
recovering the lost tabs, but the extension’s malevolence had been
painfully obvious to anyone who cared to investigate it.

Source: LWN.net – [$] Malware in open-source web extensions