@ab-garcez It seems like the issue is caused by animated tab icon. When you hover mouse over tab and animation stops, CPU usage goes down significantly. I found this suggestion on the other forum and it happens to be right.
Best posts made by no9or9
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Opera for WindowsRE: High cpu usage watching youtube
- Opera for Windows
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Opera for computersRE: Bookmarks suggestions when typing in address bar
Let me just say that Opera suddenly started to shove Speed Dial bookmarks into search which didn't happen before. And it is just annoying just because of that fact and also because the way it is implemented. Please let us turn this off.
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Opera for WindowsRE: Deleting Browsing History Items - Slow & High CPU
General Opera performance is very poor for some time. It is most apparent when it comes to watching video on Youtube. It consumes 2-3 times more CPU time than Firefox. But all other actions taken in Opera, loading pages etc are annoingly sluggish.
65.0.3467.38 update didn't solve the issue at all.
- Opera for Windows
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Opera for WindowsWhen opening a new tab the address bar is cleared after a while
The delay between opening new tab and clearing it's address bar by the browser is long enough to let user enter URL or click on Speed Dial. When you manage to do so Opera terminates loading page. This is very apparent on slower computers but not only there.