Nostr Signer Extension is a free Chrome add-on developed by fiatjaf. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory. This extension is designed to enable users to sign Nostr events on web-apps without the need to share their keys.

With Nostr Signer Extension, users can conveniently implement NIP-07, a protocol that allows for the signing of Nostr events. By utilizing this extension, users can securely sign events without compromising their private keys. This ensures a higher level of security when interacting with web-apps that require Nostr event signing.

The extension is compatible with the Chrome platform, making it easily accessible to a wide range of users. Nostr Signer Extension provides a valuable tool for those who frequently engage with Nostr events and require a reliable and secure method for signing them.