Yes, there is an open-source alternative to Zoom. It's called Jitsi Meet. https://jitsi.org/
The great toilet paper scare of 1973 - Priceonomics https://priceonomics.com/the-great-toilet-paper-scare-of-1973/
The @debian Security team updates Chromium https://www.debian.org/security/2020/dsa-4645