Following the Mozilla Firefox 1.0.8 / 22.214.171.124 updates the middle of this month
, the Thunderbird project is now at 1.0.8 / 126.96.36.199. Similar to the Firefox updates, the new Thunderbird release is focused on minor security and stability updates. Here are the release notes
for Mozilla Thunderbird v188.8.131.52. Thunderbird v2.0 is still tentatively scheduled for a release late this fall.