This looks like it:

https://git.joinfirefish.org/firefish/firefish/-/blob/develop/README.md

very nice article…

…Just a few small comments:

• “Firefish is a hot new microblogging platform”: it’s not that “new” at all, #Calckey, which has been around since 2021, has only recently changed its name to Firefish
• the antennas / news picker had apparently not yet been fully understood by the author: they do not fill retroactively and it is a full-text search that also finds parts of words. Therefore, if it doesn’t fit, search words can be excluded - it works very well for me! If you use it for a little longer instead of just taking a quick look, you can use it to structure your content very well.
• “Lack of an official app is kind of disappointing”: “official” apps are perhaps important as a “brand” for some, the so-called “Mastodon” app is also the worst app ever for Mastodon (fortunately with many better alternatives). The PWA for Firefish works great on all devices, if you don’t want to miss out on any features and want the best look, you don’t need an app.
• The biggest hindrance at the moment right now is the flagship instance at firefish.social:" The instance has clearly communicated that it primarily serves as a test instance, i.e. it does not strive for or want to guarantee stability. In contrast to mastodon.social, Firefish itself also makes clearer reference to the selection and there are now really many Firefish instances.

For me, the biggest disadvantage of Firefish at the moment is that it doesn’t yet federate properly with Lemmy.