Examine source code of Abcd PDF

{
  "manifest_version": 2,
  "name": "__MSG_ext_name__",
  "version": "3.1.12",
  "description": "__MSG_ext_description__",
  "default_locale": "en",
  "homepage_url": "https://www.abcdpdf.com/",
  "author": "abcdpdf.com",
  "browser_action": {
    "default_icon": "images/icons/icon48.png",
    "default_title": "__MSG_ext_name__",
    "default_popup": "index.html"
  },
  "icons": {
    "16": "images/icons/icon16.png",
    "32": "images/icons/icon32.png",
    "48": "images/icons/icon48.png",
    "128": "images/icons/icon128.png"
  },
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "js/content_script.js"
      ],
      "matches": [
        "*://*.abcdpdf.com/*"
      ],
      "run_at": "document_start"
    },
    {
      "all_frames": false,
      "js": [
        "js/content_script_installed.js"
      ],
      "matches": [
        "*://*.abcdpdf.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "https://*.abcdpdf.com/",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6074e725-77f3-41aa-add1-54dfd3f6eb17}"
    }
  }
}