Is possible to implement a easy to switch between multiple profiles while Firefox is already running !?
I already know about the "about:profiles" special adress, but I would like if there is not an easier way to launch a window with a new profile. These thing of launching a new window with a new profile works well in Chrome. Why not easily do this directly from a click of a button like in Chrome !?
If you want to leave feedback for Firefox developers, you can go to the Firefox Help menu and select Submit Feedback... or use this link. Your feedback gets collected by a team of people who read it and gather data about the most common issues.
Also, you may want to try out multi-account containers: https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/ . This extension allows you to create separate tabs with their own set of cookies and other site data, similar to using multiple profiles.