Glad to see some coverage of this.

It's my default browser, since Firefox Quantum.

It still allows rich customisation, via classic XUL addons. I have a vertical tab bar, merged with a vertical bookmarks bar, which is flattened via another addon. I have a rich download manager with multi-streaming, resuming, and more.

When Firefox Quantum came out, 13 of my 17 add-ons stopped working. Several versions later, I can customise it a bit, but only in limited, clunky ways, requiring manual hacking of userChrome.css, and it's not very widescreen-friendly.

I don't care about privacy. Scott McNeally was right in 1999, and he's still right: "You have no privacy on the Internet. Get over it."

I don't like the new Firefox and I probably won't be back. Waterfox fills the need nicely.