Hm? It's a getalby LN address, just got zapped by someone a few minutes ago x3
Yeah since I'm assuming this is a normal browser, but with a focus on nostr, and considering what you've shown, those are just normal bookmarks, but presented in a way to make em look like apps.
Also, this just came to mind: if a "nostr browser" becomes a thing, I'd imagine there should be a new NIP (or NIPs) that enhances the nostr browsing experience, like private bookmarks (transferable from browser to browser seamlessly) for example.