Examine source code of Discord Integration

{
  "manifest_version": 2,
  "name": "Discord Integration",
  "version": "1.0",
  "description": "Interact with Discord from your browser: quick access, send messages, and manage servers.",
  "permissions": [
    "tabs",
    "storage",
    "https://discord.com/*"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Discord Integration"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://discord.com/channels/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8c259eee-fe2c-4428-8347-df6228ee1545}"
    }
  }
}