Filled a huge form, scrolled up, it triggered auto refreshed, lost all data, moved back to Opera. Multiple existing open issues about this on forum, multiple complains on reddit, yet no action from the developers to remove this horrid feature. Apart from this, no youtube background playback feature, no option to switch to full screen, no support for chrome extensions, cannot use extensions like workona, no concept of tab grouping. In short, just another average browser copying irritating featurs