there used to be a Sunbird product that was the Mozilla calendar project. It that was abandoned as a stand alone programs many years ago if favor of the lightning add-on. That was the last of having mail and a calendar in two windows.

Matt,

Would the Sunbird product be archived where I could get a copy? Could I use it with the present Thunderbird? I really dislike the combination. After having the combination, I really appreciate how much more useful they are separated. The stand alone calendar may have been abandoned years ago but somehow I managed to keep it until fairly recently.

I have been using Mozilla products since they were Mosaic and have enjoyed watching them evolve. Forcing the combination of email with anything is (my opinion) one of Mozilla's few big mistakes. ... It is so Microsoft!

Researching the calendar problem, I have come across a spyware issue called Mozilla Location Service. Can I disable this spyware? How?

Thanks again

https://ftp.mozilla.org/pub/mozilla.org/calendar/sunbird/releases/

https://location.services.mozilla.com/ it is not spyware as far as I can tell.