Examine source code of Hide Password Length

{
  "manifest_version": 3,
  "name": "Hide Password Length",
  "description": "No one will never know what's the length of your password.",
  "version": "1.0.1",
  "content_scripts": [
    {
      "js": [
        "./scripts/content.js"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "icons": {
    "48": "icons/icons.png",
    "128": "icons/icons.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{982030f6-11d4-4f2f-8633-5bc53217bd33}",
      "strict_min_version": "42.0"
    },
    "safari": {
      "strict_min_version": "0"
    }
  }
}