Created attachment 388450 [details]
Screenshot of relevant banner
It's time to get something newer than 24.8.0 stabilized. Starting today, it seems, I start getting "This version of Firefox is no longer supported. Please upgrade to asupported browser. Dismiss" at the top of the first 24.8.0 instance opened.
I see that ww-client/firefox-bin is at 31.2.0-r1, so www-client/firefox-31.2.0 seems to be a good target.
*** This bug has been marked as a duplicate of bug 525474 ***