Examine source code of Cover Genie

{
  "manifest_version": 2,
  "name": "Cover Genie",
  "version": "3.0",
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "covergenie@yourdomain.com"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "assets/icons/cover_genie_16x16.png",
      "48": "assets/icons/cover_genie_48x48.png",
      "128": "assets/icons/cover_genie_128x128.png"
    }
  },
  "icons": {
    "16": "assets/icons/cover_genie_16x16.png",
    "48": "assets/icons/cover_genie_48x48.png",
    "128": "assets/icons/cover_genie_128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "libs/pdfjs/*.mjs",
    "config.js",
    "libs/jspdf/jspdf.umd.min.js",
    "libs/jspdf/jspdf.plugin.autotable.js"
  ]
}