Examine source code of MediaInspector

{
  "author": "Paul Rouget",
  "icons": {
    "512": "logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "MediaInspector@amo.paulrouget.com"
    }
  },
  "version": "1.0.1",
  "permissions": [
    "contextMenus",
    "activeTab",
    "tabs"
  ],
  "manifest_version": 3,
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'"
  },
  "name": "MediaInspector",
  "background": {
    "type": "module",
    "scripts": [
      "background.js"
    ]
  }
}