The Master Key allows you to interact with various protocols such as: Nostr, base layer of Bitcoin or LNURL-Auth.
You can generate one Master Key for each Account in the Alby Browser Extension
Step 1: Open the Alby Browser Extension, select the relevant account and click on 'Account settings'
Step 2: Here you can generate a new Master Key or import your existing one
Step 2a: To Create or add a Nostr private key, click on Nostr Settings
For more information about how to create, import and manage your Nostr keys visit:
Step 2b: To use the Master Key for logging into lightning-powered app via LNURL Auth), switch the toggle
Don't forget to backup your Master Key. It cannot be changed or rest in case it's lost. You will find the 12 words of your Master Key by following step 2.
Perform step 1 from above: Open the Alby Browser Extension, select the relevant account and click on 'Account settings'. You will find a button to view your recovery phrase.