Examine source code of plug.dj tools

{
  "name": "plug.dj tools",
  "version": "1.5.3",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "description": "Some tools for plug.dj",
  "content_scripts": [
    {
      "matches": [
        "https://plug.dj/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "clipboardRead"
  ],
  "web_accessible_resources": [
    "tools.js"
  ],
  "manifest_version": 2
}