I could have sworn back in the day. All well. I think zap.stream gives you an option to log in with your nsec.
Discussion
All clients (I think) have that option. Browser extensions solves this by just signing the request in your device and no nsec required to cross the internet 🐶🐾🫡
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Yes most Nostr clients provide that option but it's not advisable. That's why we have nsecBunker and spring browser that provides login using browser extension.