Examine source code of Hover Hint

{
  "browser_specific_settings": {
    "gecko": {
      "id": "{9bdcc6df-04e0-47c8-a150-1ece13897192}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "name": "Hover Hint",
  "manifest_version": 3,
  "host_permissions": [
    "<all_urls>",
    "*://*/*"
  ],
  "version": "0.5",
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "permissions": [
    "storage",
    "declarativeNetRequest"
  ],
  "description": " "
}