(In reply to Jonas Stein from comment #0) > On Gentoo Linux I compiled mail-client/thunderbird-78.9.0 and executed on the commandline > `xdg-open "mailto:to@example.com?cc=cc@example.com&reply-to=reply-to@example.com&subject=TEST"` mailto:to@example.com?cc=cc@example.com&reply-to=reply-to@example.com&subject=TEST I've tested the original link with 91.9.0 (64-bit), Win10, and that's wfm, too. Further improvements (e.g. preventing comment 5) will ship in 102 from Bug 1720348 - Dropping pill on CC or BCC buttons causes header area to have the wrong height (with reduced window height): Improve addressing area auto-height algorithm, fix splitter behaviour > Expected results: > The TO, CC and BCC lines should be permanently visible as it worked earlier. They have never been permanently visible earlier. You can now make them permanently visible via account settings (empty auto-cc/bcc) using comment 6. In addition, you can always easily open up and/or focus CC/BCC fields using Ctrl+Shift+C or Ctrl+Shift+B. Try it!
Bug 1701532 Comment 10 Edit History
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(In reply to Jonas Stein from comment #0) > On Gentoo Linux I compiled mail-client/thunderbird-78.9.0 and executed on the commandline > `xdg-open "mailto:to@example.com?cc=cc@example.com&reply-to=reply-to@example.com&subject=TEST"` [mailto:to@example.com?cc=cc@example.com&reply-to=reply-to@example.com&subject=TEST](mailto:to@example.com?cc=cc@example.com&reply-to=reply-to@example.com&subject=TEST) I've tested the original link with 91.9.0 (64-bit), Win10, and that's wfm, too. Further improvements (e.g. preventing comment 5) will ship in 102 from Bug 1720348 - Dropping pill on CC or BCC buttons causes header area to have the wrong height (with reduced window height): Improve addressing area auto-height algorithm, fix splitter behaviour > Expected results: > The TO, CC and BCC lines should be permanently visible as it worked earlier. They have never been permanently visible earlier. You can now make them permanently visible via account settings (empty auto-cc/bcc) using comment 6. In addition, you can always easily open up and/or focus CC/BCC fields using Ctrl+Shift+C or Ctrl+Shift+B. Try it!