You sure you didn’t misread? To me it looks like they allow sideloading Email apps but disallow sideloading web browsers.

From their FAQ:

Can I install my own apps?

Web browsers and social media apps are blocked at the system level. Email and work apps are not offered through the Commostore app store, keeping Callback focused on life outside work and feeds.

Users are still be able to sideload apps outside those that are blocked, using APK installer files, but Callback is designed first and foremost as a calmer, more intentional phone.

So I can receive an Email but if it has a link to a website I can’t click it? That’s just silly, Commodore. You’re doing a fine job being memeable and appealing to our nostalgia. Trying to “protect us from ourselves” like that kinda destroys that vibe. And no, the inevitable custom ROM circumventing your blocks won’t make up for it.

That one wasn’t on my bingo card lol

I once broke my leg and that was better than Chrome

Can’t load the article but I assume Arch’s rolling release way of doing updates makes this quite the disaster.