Hacker News on 18 December 2019

• Amazon, Apple, Google, and the Zigbee Alliance to develop connectivity standard
• Google claims copyright on employee side projects
• Ask HN: How Can I Learn Music Theory?
• Undocumented Catalina file access change
• PinePhone Review
• Why we Forked Firefox and Not Chromium
• Samsung chair imprisoned and 24 others found guilty in union-busting case
• The top bug predictor is not technical, it's organizational complexity
• Cliff Stoll, the mad scientist who invented the art of hunting hackers
• Google's Monopoly-Based Foreign Policy