Merge remote branch 'aaronmt/march-2013-devices'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Merge remote branch 'mozilla/master'
Bug 857365 Update the private browsing description
This updates the text about the private browsing feature in order to match the new per-window PB mode.