Examine source code of Print Friendly & PDF Plus

{
  "manifest_version": 2,
  "name": "Print Friendly & PDF Plus",
  "version": "1.3",
  "description": "Clean web pages, print, save as PDF, or activate reader mode. Now with dark mode & manual cleaning.",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_title": "Print Friendly Plus",
    "default_icon": "icons/logo_64.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "utils.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "commands": {
    "open_cleaner": {
      "suggested_key": {
        "default": "Ctrl+Shift+P"
      },
      "description": "Activate Print Friendly Mode"
    }
  },
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{49f82c3f-eb96-4013-9380-f558a67d3717}"
    }
  }
}