[hammyhavoc]

Is there any extension for Thunderbird that can handle "External Accounts" per-address signatures and sending identities already configured on a Gmail account?

I always go "I'll check out Thunderbird again" then "nope" out when I see it can't handle this kind of set up in the OOBE and most extensions don't receive ongoing support and thus stop being compatible.

I use Gmail on my phone and Pixel Watch, so ditching this setup is a non-starter as reconfiguring something as basic as email every time I get a new device or switch distros isn't my idea of a good time.