- (1) Collabora Office (https://www.collaboraoffice.com/collabora-online/), which looks like a full implementation (well, getting there), including real time collaboration with simultaneous multiuser editing. Q1. But I'm not sure whether it handles conflicts yet--it had not as of a 2019 video I watched. Q2. And I don't know whether it can work with any of the free cloud storage servers.
(2) The LibreOffice Editor web browser extensions for Chrome & Firefox (https://www.offidocs.com/index.php/prod ... extensions). Q3. But it looks like those browser extensions only allow single-user-at-a-time editing, though it's not clear to me.
Thanks,
Gary