In Android, PC, and Mac, it automatically connects with your existing browser extensions. On iOS, it's currently not possible due to WebKit limitations. I once considered building an inbuilt key manager, which would be the right direction. 

 Oh, that's why. I have no browser extensions on neither Android nor PC 😅

It'd be nice to have some kind of key manager built in 💜 

 Extensions are a great & safe way to use nostr on web, highly recommended.  

 I was on a PC, had to install Brave to have a Chrome based explorer, so it was fresh out of the box. No extensions, no nothing 😅