Gong by Jacob Harris

Zen gong that plays at a set time on the hour. 30 minute interval will play at 12:30, 1:00, 1:30,... <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/8c392a8a2a1fdc57875cdeea2e557dc531a299ed4872064e106fed8b321715ea/https%3A//github.com/bocsir/gong-extension" rel="nofollow">https://github.com/bocsir/gong-extension</a>