To those who a curious about "why?" = this is from some of the guys who worked making Opera and for those (but not only for) who liked it more than other browse

To those who a curious about "why?" = this is from some of the guys who worked making Opera and for those (but not only for) who liked it more than other browsers. Not only opera had a very nice engine of its own (not anymore in Vivaldi, though), but also great functionality and ways for customization