! Date
! Notes
|-
| SeaMonkey 2.30
| October 15
| [http://www.seamonkey-project.org/releases/seamonkey2.30/ Release Notes]
|-
| Thunderbird 31.2.0
| October 14
| [https://www.mozilla.org/en-US/thunderbird/31.2.0/releasenotes/ Release Notes]
|-
| Firefox 33.0