I've been using Vivaldi ever since reintroduced tab stacking which I loved from the Opera days. Solid browser, no complaints.

It's closed source, right?

The UI stuff on top of Chromium is closed. They don't want it ripped off I guess. Vivaldi an awesome browser for those who like to customize.

Vivaldi is still Chrome though

Yes, I'm in Vivaldi as well. For now! We need to avoid making software/product choices part of our identity.

A true firefox fan would've raised the alarm years ago, and voted with their feet when it kept moving in the wrong direction and stopped being the best option on the market.

Loving a brand no matter what they do is suboptimal.