* 66.0b1 dev ed release on aurora channel 22 Jan 2019
* 66.0b3 Beta release on beta channel: 29 Jan 2019
* Release notes[https://docs.google.com/document/d/1dRxroYdH3jfv3zvOMqDpVXlSz_qZFs1WyzfIEtujAXQ/edit# draft] - staging - final
===66.0 Release===
* 19 March 2019