Yes, it's useless for anything else, but for Nostr web apps it can't be beat.

Some web apps will allow you to sign in using nsec bunker, and Amber supports that too, but setting it up can be a little tricky. Zap.cooking does not support bunker sign in that I am aware of. 

 Got Spring on mobile now. No such luck for desktop. Boo.  

 Yeah... I would love a Nostr browser for desktop... It'll happen eventually. We're still early.