Yup, downgrading chromium-common from 83.0.4103.116-1 to 81.0.4044.92-1, and installing ffmpeg 4.2 (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=963080) brings back some sanity.
- Bug#963548: 83.0.4103.116-1 too risky 積丹尼 Dan Jacobson
- Bug#963548: 83.0.4103.116-1 too risky Yaroslav Halchenko