Examine source code of sakura background

{
  "manifest_version": 2,
  "name": "sakura background",
  "version": "1.1",
  "description": "A light and elegant sakura background for every website — gentle tones, floating petals, and timeless beauty that brings a touch of spring to your design.",
  "icons": {
    "48": "iconhoa.png"
  },
  "web_accessible_resources": [
    "hoa.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d9816150-5382-438f-9893-fcf69030d4BB}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "collects_data": false,
        "justification": "This extension only adds a static sakura background and does not collect or store any user data."
      }
    }
  }
}