Examine source code of Proofmarked.com

{
  "manifest_version": 2,
  "name": "Proofmarked.com",
  "description": "Proofmarked has a global mission: to protect the weakest link in cybersecurity. We truly made cybersecurity human-centric, giving you fair advantages over cybercriminals.",
  "version": "1.0.0",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "all_frames": false,
      "js": [
        "content-script.d319d12f.js"
      ],
      "css": []
    }
  ],
  "permissions": [
    "tabs",
    "storage",
    "<all_urls>",
    "https://cloudflare-dns.com/*",
    "https://*.digicert.com/*",
    "https://*.entrust.net/*"
  ],
  "page_action": {
    "default_icon": "proof.dd3e3077.png",
    "default_title": "click to see if this website is Proofmarked",
    "default_popup": "parcel-firefox-vmc.ad854dde.html"
  },
  "icons": {
    "48": "proof.dd3e3077.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "info@proofmarked.com"
    }
  },
  "background": {
    "scripts": [
      "background.c867dc8d.js"
    ]
  }
}