These are newer versions of the OS that introduce new capabilities (e.g., a new routing protocol or UI enhancement). They are generally less mature than recommended releases.
Using no-validate skips pre-installation compatibility checks. Only use this if you are 100% sure the firmware is correct. For production, omit this flag to allow Junos to run safety checks. juniper firmware download
Before you execute that , run through this verification checklist to prevent bricking your device. These are newer versions of the OS that