Based on Chromium 87, Vivaldi 3.5 features the ability to share URLs with QR codes via a small button in the address field, media fixes that enhance video/audio content consumption, more ways to manage tabs, single key shortcuts improvements, a new accept-language setting, and much more.
https://www.notebookcheck.net/Vivaldi-3-5-comes-with-improved-tabs-and-media-playback-URL-sharing-via-QR-code.508535.0.html