I have built and pushed Chromium 75.0.3770.90 and Thunderbird 60.7.1 to the following branches:
unstable(Already has both)
As is always the case for a short-turnaround update, this package has had only minimal testing.
Chromium update notes: https://chromereleases.googleblog.com/2019/06/stable-channel-update-for-desktop_13.html
Thunderbird release notes: https://www.mozilla.org/en-US/firefox/60.7.1/releasenotes/
Thunderbird security advisory: https://www.mozilla.org/en-US/security/advisories/mfsa2019-17/
Other packages will arrive as they are built.