K 10
svn:author
V 6
jbeich
K 8
svn:date
V 27
2019-11-29T15:44:53.353011Z
K 7
svn:log
V 149
www/firefox: switch to rc4

Changes:	https://hg.mozilla.org/releases/mozilla-release/pushloghtml?startdate=2019-11-26&enddate=2019-11-29
PR:		240440

END