Hoping that Vivaldi is going to hold off somehow - perhaps with their built-in ad blocker. And before you say "switch to Firefox", I'll say I'm not gonna, at least not until I see native mouse gestures implemented and working everywhere.
Fair enough. All I'm saying is that mouse gestures are so much ingrained in my muscle memory that their absence in native capacity (and reliance on extensions for that) is a show-stopper for me.
I miss the level of customization you could do in Vivaldi, down to minute details. But I don't miss it enough to put up with ads and tracking nonsense.
I started on Firefox back when it was a beta called Phoenix. I eventually moved to chromium based browsers like the rest of the world, but now I'm back. I've come full circle!