When trying to install the plugin on firmware 3.74 nothing happens and the vitabright log shows information about unsupported firmware.
vitabright started...
[OS] version: 03740000
[OS] isLcd: 0[OLED] hooking kscePowerSetDisplayMaxBrightness: 0x00072AFF
[OLED] getmodninfo("SceOled"): 0x00000000
[OLED] SceOled modid: 0x000100F5
[OLED] Size ok, hooking...
[OLED] Unsupported OS version: 0x03740000