This is amazing. It is the main feature that I have been wanting in Firefox for ages. It is only missing 2 things, adding the first one will improve my review to 5 stars. Please have this add-on change the icons on the taskbar or dock to match the profile icons so we can quickly tell which Firefox window is which profile when the windows are hidden behind other windows. Also, please add keyboard shortcuts for switching profiles. Great work, I love what you have done with this already.