Installing the Horse Extension (Chromium Browser Only)
This works only with Chromium Browser
Clone the repository:​
Open a terminal and run:
git clone https://github.com/lnbits/horse.git
Navigate to the project folder:​
cd horse
Install dependencies​
Run the following command (the --force flag is required to ensure successful installation):
npm install --force
Build the extension:​
npm run build
Load the extension in your browser​
- Open Chromium.
 - Type 
chrome://extensions/in the address bar and press Enter. - Enable 
Developer mode(toggle in the top right corner). - Click 
Load unpacked(top left). - Select the 
horse/extensionfolder. 
Once installed, the Horse extension should appear among your extensions.

You're now ready to securely sign offline transactions with your NSD and dive into the world of Nostr!