• Support referencing variables in extension.yaml using ${param:PARAM_NAME} syntax
• Releases the Local Emulator UI, which now starts with firebase emulators:start.
• Fixes bug causing Hosting emulator to serve invalid /__/* files.
• Fixes bug in Firestore emulator for evaluating rules in query listening. (#2197)
• Fixes support in Firestore emulator for ?show_missing in listing collection.
• Supports ?disableTriggers=true for disabling function triggers in RTDB Emulator REST APIs.
• Includes other production Realtime Database improvements into the RTDB Emulator.
• Fixes bug where functions would run in local time zone instead of UTC (#2253).