Examine source code of Discord Token Switcher

{
  "manifest_version": 2,
  "name": "Discord Token Switcher",
  "version": "1.3",
  "description": "Save and switch between Discord tokens with usernames and icons",
  "permissions": [
    "storage",
    "tabs",
    "*://discord.com/*"
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Discord Token Switcher",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://discord.com/*"
      ],
      "js": [
        "content/content.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6dfb69dc-9e61-49a9-a19c-248423d77f8d}"
    }
  }
}