Firefox is indeed, much faster and less memory intensive than it used to be. I started using it heavily (again) roughly when Quantum came out after giving up on it for years as unusable. (like many, I think - hence the article).

However.

I still find it very crash-prone. Less so over time, since Quantum came out, but still.. very crash-prone.

Perhaps I use it differently from others?

I use different Profiles to separate concerns (and give myself some small modicum of cross-concern privacy - if nothing else auth cookies are reliably separated). At any given time, I have up to 5 separate Profiles running.

With Firefox, each Profile is a fully separate PID (I assume their newer Containers are not), and there are affiliated PIDs for "Firefox CP Web Content" (similar to Google Chrome Helper, I assume).

On any given day when I log into my system in the am, one or more of those Profiles has crashed, all affiliated PIDs are dead and the Crash Reporter is up.

I don't believe anything I'm doing in any of the Firefox Profiles is particularly unusual, or extreme. No social networking, or anything with infinity-scroll. No video streaming (eg: Youtube).

So Mozilla - what gives?

Despite that complaint, I still happily use it because I believe Mozilla is much more interested in my privacy, and much more dedicated to FOSS, and because I mistrust Google. Thanks Mozilla!