Lots of good advice on how to improve your logs.

Observability is indeed not necessarily easy to fit into a code base. Here is a potential approach to make it easier. I wouldn't use it on a project where we're only logging, but once you add metrics to the mix, this kind of probes can be worthwhile.

Very nice collection of stories from the trenches of Firefox development. Lots of lessons learned to unpack about optimizing for the right thing, tooling, telemetry and so on.