JAB_Creations - 9:59 pm on Aug 12, 2013 (gmt 0)
Firefox 3.5 introduced the ability to drag a tab off and have it create a new window so that isn't anything new.
Firefox 24 is effectively Firefox 7.
Firefox 5 = Firefox 10
Firefox 6 = Firefox 17
Firefox 7 = Firefox 24
This corresponds with ESR releases that are supported for 54 weeks. Don't get me wrong, I love cutting edge but I don't have the time EVERY 42 days to update Firefox, break extensions, etc for a release that I can't even write a full sentence about in a blog entry.
I am however looking forward to Firefox 24 ESR as it'll introduce Web notifications which were introduced in Firefox 22.
For those also interested in not being forced to update every 42 days you can find the ESR releases at http://www.mozilla.org/en-US/firefox/organizations/all.html [mozilla.org].