Second thing I did was try to open a private window using the universal macOS shortcut of Cmd+Shift+N. Nothing happened, because Firefox decided to use Cmd+Shift+P unlike all other browsers. No problem, this is a macOS app, I’ll just change the keyboard shortcut in system preferences and I’ll be good to go. Except after doing that, Firefox doesn’t actually respect the remapped shortcut (an issue which has existed for 11 years).
And the baked in color management is not correct for a macOS app, and the right click menus are not Mac-like and don’t respect dark mode.
I thought it was time to make the switch, but the reality is that Firefox is still an even poorer macOS app than Chrome. Fix that and I’ll switch tomorrow, as I really want to ditch Chrome!