Highlights of Thunderbird 142 include support for adding visual signatures to PDF attachments opened in Thunderbird, support for resetting custom folder sorting in the folder pane via a new ‘Reset Folder Order’ option, and folder copy support within mail server accounts and local folders.
Firefox 143 looks like a solid release for Android users as it adds support for xHE-AAC audio playback, support for viewing the download progress in real time with controls to pause, resume, retry, or cancel directly from the Downloads screen, and improved support for persistent notifications to properly open Firefox with the relevant web page.
Firefox 142 introduces support for a flexible exception list in the Enhanced Tracking Protection (ETP) Strict mode, which should fix broken site features caused by tracker blocking. Exceptions are split into baseline (core functionality) and convenience (extra features), so you can opt for improved site compatibility without compromising key privacy protections.