Examine source code of Discord Webhook

{
  "manifest_version": 2,
  "name": "Discord Webhook",
  "version": "2.0.0",
  "description": "Extension pour envoyer des messages vers Discord via webhook",
  "author": "o2Cloud",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b98d3cfb-bd59-4fbf-8ae7-b4bb26e0adc4}",
      "strict_min_version": "78.0"
    }
  },
  "permissions": [
    "storage",
    "https://discord.com/*",
    "https://discordapp.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Discord Webhook",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "web_accessible_resources": [
    "popup.html"
  ]
}