Ok, i see you posted messages on mobil device. Are you on the phone or tablet? You have to request desktop site. On my phone if im in web browser i have to go to the right top corner click there ( i have three verticaly alignez dots ), it gives me menu, somewhere there is option 'request desktop site'. After that you should be able see icons on top of message window here. Look for picture frame icon, it should be third from right to the left.
On desktop it just normal version and you dontbhave to do anything.
So click on the icon, it will open new small window yo browse picture.
Posted via Mobile Device