MZLA released Thunderbird 142 alongside Firefox 142, including 25 bug fixes and several patched security vulnerabilities. Thunderbird provides a sortable folder list in the top-left pane with selectable views such as All, Unread, and Recent, and allows combining views and enabling a folder-pane header bar to show columns like unread counts and sizes. Users can drag folders and entire accounts to reorder them, copy folders between locations, and now reset folder order via a new right-click option. The message header pane gained More Actions commands to copy message and news links (message IDs) that open the message in Thunderbird but may not work on other installations. LibreOffice 25.8 can produce encrypted PDF files.
One of the less obvious but still useful features in Thunderbird is the ability to sort the contents of the folder list. It's the top-left pane in the main window, and it has a choice of views: All, Unread, Recent, and so on. These views are not mutually exclusive. You can combine them, for instance, showing the unread folders first, then after that, another section with all folders.
In the folder list, you can drag folders up and down to rearrange them how you wish. Entire accounts can be re-ordered by dragging them up and down the list of accounts in Account Settings. Now, if you mess up the sort order, you can right-click at the top of the list and there's a new option: Reset folder order. You can also copy entire folders from one place to another.
The header pane for each message now has a command under the More Actions menu: Copy message link and Copy news link, respectively. This was moved from the right-click context menu. You can put the resulting message ID, or mid, into a note-taking app or other program, and when it's clicked, Thunderbird will go straight to that message. These are internal ID values, though, so they probably won't work on a different installation of Thunderbird.
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