The biggest problem I had with firefox back in the day was it would eat up so much RAM. I'm a developer and I'm constantly loading, reloading, profiling etc across multiple tabs and eventually my pretty powerful PC would become slow. I had to restart firefox every time.

When chrome launched, I was thrilled that it had firebug features "built in" and that it didn't eat up 80% of my RAM.

The article mentions Firefox being not a processor hog anymore, has that changed that drastically?

After a while, Firefox would be incredibly sluggish and when I switched to chrome, I haven't looked back at all. These days, I use brave browser for personal browsing and chrome for work