Opera 39 brought a new feature: popup menu on selecting text suggesting to search or copy the selection. I must admit that it is rather helpful for me in most cases and I can say I like it but someone will probably search how to turn it off. So here is how to disable the Search/Copy popup on selecting text in Opera.
Disable the Search/Copy popup on selecting text in opera
Go to Settings:
Head to the Browser section.
Unset the Enable the search popup on selecting text checkbox:
Once you disabled the setting you won’t have any popoup on selecting text.