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Soapbox Signer is a browser extension implementing the NIP-07 signer protocol for Nostr. Manage multiple user profiles, sign events, and enjoy NIP-04/NIP-44 message encryption. Features granular per-domain permission controls for public key access, event signing with per-kind allowlists, and encryption operations. Supports Chrome and Firefox with profile metadata management and trusted domain settings.
Gooti - Nostr Identity Manager & Signer
Manage and switch between multiple identities while interacting with Nostr apps Sign Nostr events on web apps without giving away your private keys.
nos2x
Nostr Signer Extension This extension allows you to sign Nostr events on web-apps without having to give them your keys.
Keys.Band
This extension allows you to sign Nostr events on web-apps without having to give them your keys. It supports multiple keys.
Opportunity Cost
See every price in satoshis. Understand the Bitcoin opportunity cost of your purchases. Think in sound money, everywhere you browse. Opportunity Cost instantly shows the price of products and services in bitcoin ( ₿ / sats ) next to the original fiat amount. No more mental math or tab-hopping to converters—just a constant reminder of what spending really costs in Bitcoin terms. Automatic price detection & conversion – Detects 10+ local currencies and shows the live satoshi equivalent right on the page. Real-time rates – Pulls spot prices from reliable Bitcoin exchanges every ~30 seconds for up-to-date conversions. Inline or tooltip display – Choose a subtle gray sats value beside the price, or a tooltip that appears on hover. Dark mode support – Looks great in light or dark themes, automatically matching your browser’s appearance. Quick toggle – Click the toolbar icon to pause/enable on the current site or everywhere. Customisable – Pick your preferred currency, number format (sats / BTC), display precision and refresh interval. Zero sign-up, zero tracking – We collect no personal data. All parsing and settings storage happens locally (via IndexedDB); the only outbound request is for a BTC/FIAT price feed. Open-source – View the code, file issues or contribute on GitHub. Permissions note This extension uses the tabs permission solely to support per-site toggling, allowing you to enable or disable Bitcoin pricing on specific websites.
