ubrowser? Looks like there is a package for ActivityPub, not sure if lemmy has integrated by default the Mastodon API necessary to use it or if someone will have to hack something together on your instance. https://codeberg.org/martianh/mastodon.el
Reminds me of when Google Talk first rolled out as a service that utilized XMPP/Jabber, and then by the time their users made up like 90% of the xmpp comm unity, they stopped using the protocol, made it not interoperable with anything else, all but killed XMPP, turned Google Talk into Google Hangouts, than Google Duo, and I'm not sure where it ended but it too is a shell of its former self.
do you know how long between first release "open sourcing" occured? It looks like the current version of Pixelfed is published under the AGPL which is a strong Free Software licesne that all but requires an online open source development model in additon to protection of the four esssential freedoms.
I agree it woudl be a big ask even if the platforms could support it. I don't precieve anytime that it would even be a good idea to directly encourage such behavior. The #twittermigration and #redditmigration where natural occurences that hit the 'verse hard. I believe they were a net good for ActivityPub and Free Software as a whole, but for many users the hiccups at that time where enough to sour them to "decentralization."
Of course, the corpo-silos are attuned to the phenomenon, trying to adapt their marketing lingo with cool buzz words like “Federated”, “Decentralized” and so on… Some nerds who fell for it jumped from one corporate hell-hole into another, are asking us to give them 30 million dollares americanos. This amount is needed to add “fire exits” to bluesky (AKA, to decentralize it). You know, in case the silo turns out to be ehm… well another silo. After all, we can’t just use anything to talk to each other: It has to have a je ne sais quoi of sex-appeal!
ubrowser? Looks like there is a package for ActivityPub, not sure if lemmy has integrated by default the Mastodon API necessary to use it or if someone will have to hack something together on your instance. https://codeberg.org/martianh/mastodon.el