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Firefox's Profiles get a huge upgrade with easier Profile Creation, Switching and Customization
(windowsreport.com)
A place to discuss the news and latest developments on the open-source browser Firefox
That just means it's in active development and will come to the beta browser soon, and then to the stable version.
"for people"
This doesn't mean a lot for people who don't know about people, or dont want to look it up.