(For me - and probably many others - though I use 1password since the beginning, have 50 tabs open so sync is a challenge and never understood to use the profiles, perhaps I'm too stupid or the UI is bad)
When it came out I thought profiles was a good idea, eager to use it, but it's often difficult to say what is in what profile. AWS is clear, and banking, but reading some articles? For me to work the UI would need to be smooth so I don't need to switch profiles just because something is in the other. Perhaps I'm not focused enough ;-) It then was too complicated for me to use and switch and I dropped it.
Writing this in FF, where would I need to click to switch profiles? I have a drop down on the right (it's not in there), I have a drop down on the left (also no profiles), I have a menu at the top(can't find it there) and a drop down in my sidebar (no profiles in there).
On a phone iOS Safari has “tab groups” that effectively act as windows in a desktop browser. It also has a tab search feature.
https://addons.mozilla.org/firefox/addon/multi-account-conta...
Go to about:profiles. From there, you can create and switch between profiles. This is not as convenient as it perhaps should be, but I did find one add-on that claims to simplify the process [1].
"Create, edit, delete and switch between browser profiles seamlessly in Firefox. Inspired by Chrome's profile switcher."
;-)
The synchronization of browser tabs and history across devices is also very good nowadays, so if you look at some product on Amazon with your phone on the way home, you can continue the same browsing session on your regular PC right away.
There are also multiple profiles. That helps in case you have multiple Amazon accounts like one for shopping, one to mooch off your cousin's prime video subscription, and one to work with the AWS console for your workplace. I think you couldn't do that out of the box 10 years ago.