@AxelR11 if ya don't mind me ask n..
are ya use 'n - desktop - laptop
what version of windows..
what graphic card..
what version of Opera and - is it 32/64 bit..
HDMI Cable or HDMI-DVI Cable..
while in Chrome - which DisplayPort version is Selected..
ya said this - (The problem is that I can not enjoy HDR on Opera, but I can use it on Google Chrome)
so i think Hdr works in opera sorta.. but or what kind of problems ya got..