Sorry Vivaldi does a lot of new age visual junks, which slows surfing, but come nowhere close to what O12 could/can do. Like how about put all function icons on the menu bar -- clik, script on, clik script off, and so forth. This a turn on the spirit is willing, but it just can't do what the flesh of Opera 12 could.
Vivaldi 2.5 is now live and this update turns Opera 12's spiritual successor into the first browser to feature full integration with Razer Chroma — the world's largest lighting ecosystem for gaming devices. Other noticeable changes are the ability to resize Speed Dial thumbnails and improved Tab Selection options.