The latest update, labeled 2.9.1705.31, is now available with multiple enhancements to the Vivaldi Menu, the ability to set global default preferences for requests based on sound, geolocation, camera, microphone, motion sensors, Bluetooth devices, and pop-ups, as well as multiple tweaks and fixes.
https://www.notebookcheck.net/Vivaldi-2-9-has-arrived-with-significant-improvements-in-tow.440634.0.html