Thank you very much @Pmalek, @TryNinja you are right and there has to be a setting for popups, but I couldn't find it. Just remember that there was such a setting in older browser versions.
Anyway, tried to use Chrome again and hasn't used it for a while. When opened, the pop-up window shows up, to make Chrome my main browser, which I did.
When logged to Bitcointalk, message window shows up, asking for permission to show Bitcointalk notifications and from now I see this before deleting the post.
Thanks again