Chrome logpoints – Use console.log() without having to add console.log().
serverless-benchmark.com – The cold start issue can be a real problem.
Malcolm, Monster-In-The-Middle – HTTPS interception statistics.
Choose Boring Technology – You could also describe this as “choose proven, well understood, battle tested technology”.
send.firefox.com – Claims “end-to-end” encryption, which I don’t think is entirely accurate. Still, handy if you need to share large files.
cache-tests.fyi – How different browsers do caching. An area where the only consistency is inconsistency.
Battery Status API – navigator.getBattery().
How Google Search indexes JavaScript sites – “JavaScript is expensive”, especially if you are trying to render trillions of pages.
Cache Control for Civilians – A good general reference regarding cache control on the web. I don’t think the query string information is accurate, but that doesn’t take away from how helpful the rest of it is.