NIP-07 friendly description

When people use web clients for the first time, many are redirected to this page to learn about signing in with a browser extension. This page keeps a good list of options, but it is technical.
Adding a "Nostr How To" here may make it easier for non-devs to understand NIP-07.

07.md

@@ -2,7 +2,22 @@ NIP-07
 ======
 
 `window.nostr` capability for web browsers
+
 ------------------------------------------
+### Nostr How To: Browser Extensions
+
+*Browser extensions with nostr NIP-07 are an extra security layer for your private or secret key (nsec)*
+
+**Best practice:** Do not enter your nostr private key directly in a nostr client website, use a browser extension instead.
+
+1. Download and setup a browser extension (list below)
+2. Generate a nostr key pair*, or if you already have one, save a copy in your browser extension
+3. Use your browser extension of choice to sign in and create notes in nostr web clients that support this feature
+
+*Keep a backup of your public and private keys in a password manager
+
+------------------------------------------
+### Technical Specifications
 
 `draft` `optional` `author:fiatjaf`
 
@@ -21,7 +36,7 @@ async window.nostr.getRelays(): { [url: string]: {read: boolean, write: boolean}
 async window.nostr.nip04.encrypt(pubkey, plaintext): string // returns ciphertext and iv as specified in nip-04
 async window.nostr.nip04.decrypt(pubkey, ciphertext): string // takes ciphertext and iv as specified in nip-04
 ```
-
+------------------------------------------
 ### Implementation
 
 - [horse](https://github.com/fiatjaf/horse) (Chrome and derivatives)