Using this plugin is much better and easier than creating profiles in Firefox manually, because instead of having to open a new window for each profile, with this plugin you can view different profiles in a single window.

This greatly minimizes memory usage (up to 5 times less).

Browsing between profiles is much more intuitive and organized, as you can distinguish each profile by the color of the tab and identify the name of the profile that is displayed in the navigation bar.

This plugin is without a doubt the best profile manager currently available in all browsers I have used.