Earlier quoted context omitted.
After reading that article in 2014, I switched to Firefox. I used it from that point until just a few weeks ago when a program bypassed my defaults and launched Chrome. And I immediately remembered why I preferred Chrome and how much more responsive it feels, and how it handles plugins and per-tab processes and uses a quarter the memory somehow. So now I'm back on Chrome. Felt good to be on FF for awhile, felt like I…
I've heard this same thing from many people, and the problem almost always turns out to be accumulated cruft in the Firefox profile. Switching to a "fresh" browser usually makes it feel much more responsive because you don't have the cruft. If that's the case for you, following the steps at https://support.mozilla.org/en-US/kb/refresh-firefox-reset-a... may help.
It's also worse on power. FF tends to drain my battery much faster than Chrome. That's with I'm still using FF as my main browser but will probably switch to Chrome again.