
Samsung Galaxy Note
The latest firmware for Samsung Galaxy Note (GT-N7000B) is N7000BDVLSB with Jelly(Android Bean), released on May 7, 2013 for 1 region (CSC). Every official firmware build for GT-N7000B, newest first: one row per build with all regions (CSC) that received it.
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/N7000BDVLSB
The newest build, N7000BDVLSB, was released on May 7, 2013. No new build has appeared for 163 months, so regular updates for this model have most likely ended.

GT-N7005

GT-N5105

GT-N8020

GT-N8013

GT-N8010

GT-N8005

GT-N8000

GT-N7108D
The latest build for GT-N7000B, N7000BDVLSB, was released on May 7, 2013 (13 years ago).
GT-N7000B has had no new firmware for 163 months, so regular updates have most likely ended.
Yes, all firmware files for GT-N7000B are 100% official, original, and obtained directly from Samsung servers.
To flash GT-N7000B, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing GT-N7000B.