Examine source code of Bubble Cursor Green

{
  "name": "Bubble Cursor",
  "version": "1.0.1",
  "description": "Bubble cursors that shrinks and grows to select links on a page",
  "manifest_version": 3,
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Bubble cursor"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "icons": {
    "32": "icons/icon_32.png",
    "64": "icons/icon_64.png",
    "128": "icons/icon_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bubblecursor@plucafs",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}