Mozilla Firefox 43.0.2, Mozilla Thunderbird 38.5.0 リリース

PC

Fixed Various stability and security fixes
Changed Use a SHA-256 signing certificate for Windows builds, to meet new signing requirements

Firefox 43.0.2, See All New Features, Updates and Fixes

Fixed Various security fixes
Fixed Prepare to use SHA-256 signing certificate for Windows builds, to meet new signing requirement (1079858)
Fixed In the address book manager, make the contacts sidebar remember the last selected address book (1142705)

http://www.mozilla.jp/thunderbird/38.5.0/releasenotes/

Firefox 43.0.2とThunderbird 38.5.0がリリースされていました。
ここのところ、更新が多いです。