Available for Windoze, Mac, and Linux
From the ZD article
The Vivaldi browser now offers a Google-free replacement for Chrome on Microsoft Windows, Mac OS X and Linux. Switching requires very little effort because, like several rivals, it's based on open source Chromium code, and renders websites exactly like Chrome.
Vivaldi even runs extensions from the Chrome Web Store, including uBlock Origin and TinEye Reverse Image Search. (I've not had problems, but test your must-haves before switching.) However, the long-term aim is to deliver a browser that does what its users need, not one that needs overloading with extensions that slug the performance.
Why would anyone want to switch away from Chrome? Generally, there are three reasons. First, there's a dislike of Google's surveillance-based business model. Second, Chrome is aimed at the mass market, whereas Vivaldi is aimed at "power users". Third, there's Chrome's avaricious consumption of PC resources. The days when Chrome was "lean and mean" are long gone.
Vivaldi solves the first two problems, but not the third. If anything, it consumes slightly more resources than Chrome. The extra features come with a price.