An good features landed recently via Firefox? (since 2.15.2)

[mzso]

Hi!
I'm asking those who follow closely. Did any good features appear, that hopefully decreases feature the gap to Fennec?

I'm using old Fennec (via F-droid, so it wouldn't update even when auto updating decides to re-enable itself), and Iceraven on the side, because several websites to decided to break themselves on older browsers, for no functional gain...