I had a few times in past years when I got so irritated by sluggishness of Firefox that I moved to Chromium, despite of the completely unusable tab UI it has when compared to Firefox's (even without addons). Well, it always turned out that Chromium with 8GB RAM and my browsing habits is even worse, so I returned back to Firefox, but if I had 16 or 32GB of RAM it might have turned out to be a different story.

I'm so glad Firefox catches up. Instead of thinking "I wish Chromium had better UI and I had more RAM", I can just be happy with my browser, embracing my workflow instead of trying to adapt it to the available tools.