@temkem @wisp228 @johnd78 I solved this problem. So what i do first is full reinstall of Opera. The result i got fully satisfied me. But when I logged in to my google account, I lost this feature. So I tried to think, and then realized that the reason was my google account settings. I went to the search settings and disabled this flag (open results in new window). Now everything works fine. Use my tips to solve this problem. All the best, goodbye!!!
PS I attached screenshots where you can understand how to disable flag.