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.
https://www.notebookcheck.net/Vivaldi-2-5-comes-with-Razer-Chroma-support.420189.0.html
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.