On paper yes. The problem is that they clutter the UI, they trigger at weird times and they turn out to be less useful that they may appear.

Then there's also people, like me, who just want the browser to browse the web. I don't want link preview (annoying feature), Firefox isn't my PDF viewer, I don't have that many tabs that I need to group them and I don't use AI chatbots.

So having a single button to disable all of these features is pretty great. I still want a Firefox Lite, that just does browsing and allows me to add the few extension I want to whatever feature I believe is missing.

I started clicking a 'next page' link before I'd actually finished reading something (so I kept holding the mouse buttown down), and a couple of seconds later Firefox popped up a 'link preview' box informing me that I was clicking on a link to a web forum. Wow, thanks, couldn't have figured that out myself. (It did not actually summarize the next page in any way.)