Mountain Lion is coming. Does Firefox 13 support it? https://wiki.mozilla.org/Firefox/Planning/2012-05-30#Beta_.2813.29
(In reply to Kohei Yoshino from comment #0) > Mountain Lion is coming. Does Firefox 13 support it? > https://wiki.mozilla.org/Firefox/Planning/2012-05-30#Beta_.2813.29 We don't know yet, it hasn't been released.
What does it mean? > First beta with Mountain Lion support
Now that it's released, can this bug be re-opened or is this being tracked somewhere else? Some users think that not listing 10.8 means there are known issues but I haven't heard of any major ones.  TB User: http://forums.mozillazine.org/viewtopic.php?f=39&t=2507051&p=12169319#p12169319
It's not fixed in Aurora release notes: https://www.mozilla.org/en-US/firefox/20.0a2/system-requirements/
Apparently this was done in r108706 for the release channel of Firefox 17 but it's still missing for Aurora (like comment 5 mentioned). I filed bug 932125 to add OS X 10.9 Mavericks.  http://www.mozilla.org/en-US/firefox/26.0a2/system-requirements/
Aurora notes on stage & production updated going back to 20.0a2 http://viewvc.svn.mozilla.org/vc?view=revision&revision=122260 and up to date to include 10.9 in 27.0a2 (and 25,26 aurora)