Examine source code of 98book XL

{
  "name": "98book XL",
  "version": "1.1resigned1",
  "description": "Make 98book readable on mobile",
  "content_scripts": [
    {
      "matches": [
        "*://98book.com/readbook/*/*/*.html"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{0d16fc36-7086-4cfe-bbf4-53dea2b7939b}"
    }
  }
}