nos2x-fox is described as 'Firefox add-on that lets you manager your Nostr keys in one place, and then sign events in websites without exposing your private key' and is an app in the web browsers category. There are three alternatives to nos2x-fox for Google Chrome, F-Droid, Chromium, Mozilla Firefox and Android. The best nos2x-fox alternative is Amber Nostr Event Signer, which is both free and Open Source. Other great apps like nos2x-fox are Nostr Connect and nos2x.
Amber is a nostr event signer for Android. It allows users to keep their nsec segregated in a single, dedicated app. The goal of Amber is to have your smartphone act as a NIP-46 signing device without any need for servers or additional hardware.
The Nostr Connect Chrome extension offers a secure way to sign Nostr events on web applications without exposing your private keys. Serving as a fork of the popular nos2x, it enhances user security and privacy by managing event signatures locally within the browser.
