I’m sure you’ll find a way if you’re determined enough!
You may find, though, that interoperability between platforms isn’t always quite extensive enough to do everything you want to without switching for certain features. Like, I can read top-level lemmy and kbin threads in firefish, and I can reply to lemmy threads, but I can’t read comments on either and I can’t reply to kbin threads.
What I’ve done instead, though, is set up a VIA macro to swap over to the next tab, cut the current url, head to lemm.ee, tab to the search, paste, search, and pick the top link. Between firefish and lemmy it covers most of the other instance types, though I haven’t tried posting to a wordpress yet.
Happy to do some interoperability testing with firefish, though! I’m curious how I can interact with which platforms!