I’ve been using #SingleFile to save threads, often from their originating site, for a while now and it seems to work well. I think it includes all publicly visible comments that reached the originating instance.
#Fediverse #Mastodon #archiving
https://github.com/gildas-lormeau/SingleFile
GitHub - gildas-lormeau/SingleFile: Web Extension for saving a faithful copy of a complete web page in a single HTML file

Web Extension for saving a faithful copy of a complete web page in a single HTML file - gildas-lormeau/SingleFile

GitHub