Examine source code of Genealogy Blurring Tool

{
  "manifest_version": 3,
  "name": "Genealogy Blurring Tool",
  "version": "1.8.1",
  "description": "Automatically blurs sensitive elements on genealogy websites for privacy-minded screenshots and screencasts.",
  "author": "Genea",
  "browser_specific_settings": {
    "gecko": {
      "id": "genealogy-blurring-tool@genea.ca"
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/iconoff16.png",
      "48": "icons/iconoff48.png",
      "128": "icons/iconoff128.png"
    },
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.ancestry.ca/*",
        "https://www.ancestry.com/*",
        "https://www.ancestry.co.uk/*",
        "https://www.ancestry.com.au/*",
        "https://www.ancestry.de/*",
        "https://www.ancestry.fr/*",
        "https://www.ancestry.it/*",
        "https://www.ancestry.mx/*",
        "https://www.ancestry.ie/*",
        "https://www.ancestry.se/*",
        "https://www.ancestry.pl/*",
        "https://www.ancestry.nl/*"
      ],
      "js": [
        "core.js",
        "sites/ancestry.js",
        "engine.js",
        "picker.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://www.myheritage.com/*",
        "https://www.myheritage.se/*",
        "https://www.myheritage.dk/*",
        "https://www.myheritage.no/*",
        "https://www.myheritage.fi/*",
        "https://www.myheritage.de/*",
        "https://www.myheritage.pl/*",
        "https://www.myheritage.es/*",
        "https://www.myheritage.co.uk/*",
        "https://www.myheritage.fr/*",
        "https://www.myheritage.it/*",
        "https://www.myheritage.nl/*",
        "https://www.myheritage.be/*",
        "https://www.myheritage.cz/*",
        "https://www.myheritage.sk/*",
        "https://www.myheritage.si/*",
        "https://www.myheritage.hu/*",
        "https://www.myheritage.gr/*",
        "https://www.myheritage.ch/*",
        "https://www.myheritage.at/*",
        "https://www.myheritage.pt/*",
        "https://www.myheritage.lt/*",
        "https://www.myheritage.lv/*",
        "https://www.myheritage.ee/*",
        "https://www.myheritage.ro/*",
        "https://www.myheritage.co.il/*",
        "https://www.myheritage.com.tr/*",
        "https://www.myheritage.com.br/*",
        "https://www.myheritage.com.ua/*",
        "https://www.myheritage.com.ar/*"
      ],
      "js": [
        "core.js",
        "sites/myheritage.js",
        "engine.js",
        "picker.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://www.familysearch.org/*"
      ],
      "js": [
        "core.js",
        "sites/familysearch.js",
        "engine.js",
        "picker.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://www.familytreedna.com/*",
        "https://tree.familytreedna.com/*"
      ],
      "js": [
        "core.js",
        "sites/ftdna.js",
        "engine.js",
        "picker.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://app.gedmatch.com/*"
      ],
      "js": [
        "core.js",
        "sites/gedmatch.js",
        "engine.js",
        "picker.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://you.23andme.com/*"
      ],
      "js": [
        "core.js",
        "sites/23andme.js",
        "engine.js",
        "picker.js"
      ],
      "run_at": "document_start"
    }
  ]
}