I really loved "Mailbox Alert". I have multiple work and private accounts, and want to only get notifications on work mails, and not my community or private accounts. Ideally, have different sounds. Mailbox Alert did this perfectly. Sadly it is not supported for recent Thunderbird. And the developer mentioned that it's too much work to support new Thunderbird: https://github.com/tjeb/Mailbox-Alert/issues/76 Since it isn't a thing of Thunderbird core ("turn notifications on or off" seems to be the stance), I'd love to get some options, but don't know a thing about add on development myself. Where could I get in touch with developers to sponsor to build such a thing? Or at least get pointers on where/how to hook into notifications via an add-on? Is there a coding-subcommunity for Thunderbird add-on developers? I am a PHP/JS-developer, so maybe I could try some things but would definitely need some sort of "kickstart" to know where to get things... https://support.mozilla.org/en-US/contribute doesn't have a bubble for "Write add-ons" or "Contribute code", but I'm sure there must be a place?! Regards, Garvin