Examine source code of Cube Feedback Tool

{
  "name": "Cube Feedback Tool",
  "description": "a tool to give feedback on cube sites",
  "version": "0.1.3",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "hi@cube.com"
    }
  },
  "icons": {
    "16": "cube.png",
    "48": "cube.png",
    "128": "cube.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_icon": "cube.png",
    "default_title": "feedback tool",
    "default_popup": "screens/popover.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "index.js",
        "index.css",
        "screens/overlay.html",
        "screens/popover.html",
        "screens/callback.html",
        "assets/domainService*.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ]
}