Just installed opera-developer from the aur today, and I can say that there is only three reasons I cannot switch from my current browser. These three things are: No tab cycle mouse gesture(I use click upward for this), secondly no way to hide the url bar, and thirdly no way to hide tabs. I currently use vivaldi and I'm able to hide everything I don't need and I'm able to configure everything else through mouse gestures. I hope these features can be added to opera.