Examine source code of Cute Save Button

{
  "manifest_version": 3,
  "name": "Cute Save Button",
  "version": "0.8.5",
  "description": "__MSG_extensionDescription__",
  "author": "Deil",
  "default_locale": "en",
  "icons": {
    "48": "bestgirl.png"
  },
  "permissions": [
    "downloads",
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "js/settings-default.js",
      "js/background.js",
      "js/download.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "js/content-script.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "bestgirl.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true
  },
  "action": {
    "default_icon": {
      "48": "bestgirl.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ochecuteextension@plaza.ink",
      "strict_min_version": "115.0"
    }
  }
}