User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0

Steps to reproduce:

I press a mailto link in Firefox. The mailto link comes from a CRM and contains potential cc and bcc addresses in addition to the recipient. Especially the bcc address is important because it feeds a copy of the mail back into the CRM when the mail is sent. This had worked until Thunderbird 91.8.1 on Windows (that's the last version I had installed before 102).

Example of mailto link:

mailto:customer@example.com?cc=recipientcc@example.com;recipientcc2@example.com&bcc=crm-feedback@example.com&subject=Response to your ticket #1234&reply-to=support@example.com

Actual results:

Das Thunderbird compose-Fenster öffnet sich. Der Empfänger ist wie erwartet ausgefüllt, ebenso der Betreff. Es fehlen die Einträge für cc und bcc. Reply-to hatte in der Vergangenheit bereits schon nicht funktioniert.

Expected results:

The Thunderbird compose window opens. The recipient, cc, bcc and subject are filled in. If the reply-to could also be included, that would be even better of course ;-)

Actual results:

Das Thunderbird compose-Fenster öffnet sich. Der Empfänger ist wie erwartet ausgefüllt, ebenso der Betreff. Es fehlen die Einträge für cc und bcc. Reply-to hatte in der Vergangenheit bereits schon nicht funktioniert.

Sorry... I accidently copy/pasted the German translation. It should be:

"The Thunderbird compose window opens. The recipient is filled in as expected, as is the subject. The entries for cc and bcc are missing. Reply-to had already not worked in the past."

I'm not sure what's going on with these mailto links not working, but it's not just a Thunderbird 102 bug. There's some other factor, as the example cited here and all others work just fine for me. Including all fields.