Is too fine in fact is Nice

@leocg I had run an anti-virus and cleaned some other problems too but i also discovered the cause of the problem. Which is not related to the browser or at least not directly. It was a website that i am using that was having pop up ad system which normally always blocked by Opera but seems they either changed something or my Opera got lazy so it started to show itself. Added it to the adblock list as an extra measure which now closes the pop up easily. Though why it didn't before i do not know. Anyway thank you for helping me.

@leocg Some of the Youtube ads are getting by uBlock Origin too, so that's probably correct.

It's legit and the notification and extension are built into Opera. Your only option is to click "Not now" and then it won't bug you for a while. If it still bugs you every single time after clicking "Not now", then there's something wrong.

Told you this (Opera) company keeps falling down & down. Management & Developers acts like a great db a & doesn't care about users.
Poor quality of their products & service. Day by day it gets even poorer. Quality keeps falling. Company revenue gets falling down, company's share market gets falling down.
These d**b poor crappy Chinese turns the company down. Go to hell....

https://www.ghacks.net/2020/01/19/what-is-going-on-at-opera-software/