I had posted this on the old Crowdicity site, but since that got deleted, I am posting a version 2 of the Firefox Profile Chooser Concept.
Feel free to leave any feedback!
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Cool concept but it would need to be paired with an easier profile switcher (e.g. toolbar dropdown that opens a separate browser window for each profile) instead of having to go to about:profiles
I would welcome this on the Firefox View tab.
If you're looking for a way to achieve similar functionality, you might want to check out Browser Tamer. It's a nifty little app that could help you out. You can find more information about it and download it from this link: Browser Tamer - https://www.aloneguid.uk/projects/bt/
I hope this helps! Let me know if you have any further questions.