Orion is WebKit based, so it uses less battery and feels faster to me compared to Chromium browsers, yet it largely supports Chrome extensions via a compatibility layer; like Helium uBlock Origin is included by default. It also has vertical tabs which is essential for me, and open-url routing between profiles.
However, I tried it in January 2025 and gave up on using it after a few weeks of sporadic bugs. I didn't lose data or anything but some actions in the UI didn't produce any result, or they produced a confusing unintended result. I hope they get better - I will probably give it another go in a few months, especially since Arc (my current browser) is now owned by Atlassian.
Anyways, great to see a Chromium browser improving on the privacy of ungoogled-chromium.