I thought Vivaldi 7.5 had some interesting additions.
The right-click menu for tabs now has a Progressive Web Apps submenu which allows you to create an app with a click.
If you’ve been avoiding Vivaldi because it was not private enough, note that their advertising blocker “now supports badfilter, strict3p, and strict1p rules”, and “It is now possible to define a custom DNS provider for just the browser, with support for DNS Over HTTPS”.
Jon’s blog also includes IKEA instructions for a bug hotel: to improve biodiversity in your backyard.