There was a time when Firefox felt a lot slower than Chromium, but for a few years now it's been close enough (even if still somewhat slower) to not bother me, while Firefox clearly offers superior functionality and much better performance under high load. The last time Chromium has felt attractive compared to Firefox was a really long time ago. Glad to see it moving in the right direction still.
Edit: so I just looked and it turns out you can enable tab bar scrolling on chrome://flags/#scrollable-tabstrip. Why is that even disabled by default?