I've used Chrome, Firefox and Opera. I've liked Opera but there's this one thing which is stopping me from using it as my main browser. That is, you can't slide with the mouse at the top-most portion of the screen.

Need more explanation?
Here I'll post a few gifs from the three browsers stated above to make it clear.

Chrome - https://gyazo.com/98d5afc4ee26ee1a516d291ff796a834.gif
Firefox - https://gyazo.com/eba97411ff171ca0a5e0a3b937ae09d6.gif
Opera - https://gyazo.com/469a699eaa8bdb1963c848ae701909db.gif

As you can see, at first, I try to slide it normally, and then I try to slide it from the top-most portion. I tend to slide it from the top-most portion when I have to do something quick. Well, nobody likes to wait, so I usually slide from the top-most portion and it doesn't work on Opera. If this feature is added to Opera, I'll make it my default browser, until then I'm forced to use another browser.