[I write in English so this question can have a broader audience] I already have three different user profiles to use Firefox for different activities (work, personal, others work). I try to use keyboard shortcuts as much as possible because I get less fatigue with keyboard than mouse. I am really eager to find out a keyboard combination to switch to a different profile in Firefox. Something that Firefox itself can recognize (and I can be able to customize, also). These requirements are becoming a must in every application, AFAIK. Not using the already defined shortcuts by operative system is important: that's why this feature must be customizable. Besides, using op sys shortcuts for launching Firefox profiles is not a nice option because I am practically out of them! So please provide us with a customizable shortcut to do it. THANKS.