consentreality
I do know there's a flag to launch the profile manager, but I find that to be a nuisance. I don't want to launch it every time, because I'm constantly launching and killing browser instances. Dedicated shortcuts cuts out that step, but in my case would require 5+ shortcuts via .desktop files on my Linux machine, and a matching set of icons on my Windows machine, with the mental overhead that comes from selecting and switching.
The extension is much closer to the behavior I want (Chrome's).
Conversely, I experience a frustrating Chrome bug on Linux, where after some amount of time, external links open a new instance of every profile, and an error window. I've had no luck troubleshooting that, and it helped motivate me to try Firefox again.
I'm currently doing my yearly attempt to switch, using the Profile Switcher extension [0]. It works well enough, but requires external software running and I fully expect it to break eventually. I also can't open links in anything but the default profile (vs Chrome opening in the profile most recently active, a nice convenience).
[0] https://addons.mozilla.org/en-CA/firefox/addon/profile-switc...
So sure, maybe all my decisions are on rails, and I experience the illusion of having made them. But there's no reason to dismiss that illusion as immaterial. It can be thought of as a sanity check. A sort of after-the-fact free will for future unconscious processes to consider. Which in practice, feels exactly like the free will of having made the decision in the first place.