Vlad If Kaktus were a browser with a large audience, the deviation from convention might make sense.
Let's think about it this way: Orion has a lot of new functionality that is rare or doesn't existing in the most popular browsers. There's a lot of stuff to learn, and you want new users to use these new features as that's your value proposition over established apps. So it's in your best interests to reduce the amount of re-learning a user has to do.
As the famous UX saying goes, "don't make me think!!" Don't make users think about stuff that's already well established.