
The latest firmware for GT-S5360L is S5360LVSML2 with Android 2.3.6 (Gingerbread), released on December 4, 2013 for 2 regions (CSC). Every official firmware build for GT-S5360L, 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/S5360LVSML2
All 5 builds in our database run Android 2.3.6 (Gingerbread). The newest build, S5360LVSML2, was released on December 4, 2013. No new build has appeared for 156 months, so regular updates for this model have most likely ended.

GT-S7508

GT-S7500T

GT-S6812

GT-S6500L

GT-S5690L

GT-S5670

GT-S5570I

GT-S5303
The newest firmware for GT-S5360L runs Android 2.3.6 (Gingerbread): build S5360LVSML2, released on December 4, 2013.
The latest build for GT-S5360L, S5360LVSML2, was released on December 4, 2013 (12 years ago).
GT-S5360L has had no new firmware for 156 months, so regular updates have most likely ended.
Yes, all firmware files for GT-S5360L are 100% official, original, and obtained directly from Samsung servers.
To flash GT-S5360L, 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-S5360L.