@KetoKelo Thank you for advice, unfortunatelly this not work on my case. I enable this option, but no effect on menu and right click still not work. maybe my pc is old enough and no hardware acceleration here? How to downgrade to 70...?
If you are using Ubuntu or Linux Mint, I saved the latest .deb file that I downloaded from Opera. It is version 70.0.3728.119. I uploaded it for you here:
It will tell you that you have a newer version installed on your computer, because you have already installed 71, and ask you if you really want to use an older version. Accept it and proceed to install.
Other versions for different Linux distributions can be found here: Opera Install