This is exactly how I feel looking at this "meme". It's all money related and feels like it's encouraging people to say things like "oops I forgot to cancel my Amazon prime subscription, I must have ADHD haha". We live in overwhelming times, too much information everywhere, too many subscriptions, too much stuff with instant access, but nobody ever mentions that.
People used to get their news from a newspaper once a week. There weren't 10-20 "subscriptions" to keep track of. You couldn't pull a thing out of your pocket to relieve boredom or sadness or loneliness, and people couldn't contact you expecting a response within an hour. We're not used to this biologically...
To me, this meme seems to be making fun of ADHD more than anything.
From what I've seen they're only adding ways to use AI more efficiently from the browser, it's not like they're developing their own AI, or forcing anyone to use it. It's not even an obvious feature either, and you need to set it up with an existing AI service.
So on the AI enshittification scale, I'd rank Mozilla pretty low (unless there's something I'm unaware of)