This is part of Googles strategy. Ever since the Chromium engine took off enough and everyone else fell behind they began introducing more and more changes that merely benefits them, with less public debate or proper communication (or even adherence to common standards). Last thing I remember, aside of manifest v3, was them killing off JPEG XL as it was a competitor to webp and webm (which they control). JPEG XL was actively worked on and would’ve probably turned out better before they killed it without any previous notice.
Given Googles dominant market position, their influence and everyone wanting to cut corners wherever possible sometimes Firefox support is just ignored.
tl;dr It’s not Firefox’ fault. It’s Google’s sabotage.
This. I wholeheartedly concur that corporate “social” media is fucking shit up like hell, however as long as people are socially stuck there they will be around, as as long as that is the case people who need to make a living will have to roll out stuff and communicate with people there.
In fact this is specifically the kind of tool a friend and me looked for but couldn’t find as FOSS until now, although we’d definitely need support for the Mastodon API / Lemmy.
One may argue which platforms to choose (depending on what you want to show people or who you want to reach). But completely abandoning garbage platforms ain’t possible right now, especially for small businesses who need to be seen somewhere.