if you will delegate to an instance the decision on what to show you on your browser when you connect to it, you'd have to pick an instance that does that for you. mastodon mainline could make that configurable. someone could patch mastodon in their instance to behave as you wish. you could run your own instance. you could run something other than mastodon that behaved as you wish. these are all in line with the notion of decentralization and browser-based UX. I sense there's some other unstated requirement.

Alexandre Oliva started following Movimento Software Livre.

do I hear anyone mention git?

uma pégasus fêmea?
lembrei daquele sucesso do biafra, sonho de ícaro. cabe uma paródia aí

tem noção do impacto ambiental de fazer uma perguntinha pro chatgpt?
tem noção de que fazer essa computação sob controle alheio é aceitar subjugo injusto?

free software is about freedom, not about licensing.
copyright is, by default, an obstacle to the essential freedoms, so we have to come up with licenses that relax the prohibitions so that others can have the freedoms they deserve. if copyright were to go away, that would remove one of the main obstacles for users and developers to have freedom.
it would also remove our main defense, namely copyleft. copyleft licensing is not a requirement of free software, it's a strategic choice based on available legal tools. if we were to lose that defense, publishing free software and hoping it remains free for all users would be a vain hope, because downstream copies, modified or not, could be separated from the essential freedoms. but the published version, accompanied by source code, would be freedom-respecting, thus free software, regardless, just like source code in the public domain today.

eu conheci o gnu no mês em que o linux foi lançado. demorei anos pra me interessar pelo linux. usava gnu noutros sabores de unix.
curiosamente comecei a usar gnu sobre linux justamente no ano em que o linux deixou de ser software livre. demorei outros tantos anos pra descobrir que tinha sido enganado.