Examine source code of Phishing Blocker

{
  "description": "This extension detects websites trying to pretend to be someone else. It spots attacks by homography and address masking.",
  "manifest_version": 2,
  "name": "Phishing Blocker",
  "version": "1.1resigned1",
  "icons": {
    "48": "icons/stop_phishing.svg"
  },
  "applications": {
    "gecko": {
      "id": "phishingblocker@hjok.com",
      "strict_min_version": "62.0"
    }
  },
  "permissions": [
    "tabs",
    "<all_urls>",
    "storage"
  ],
  "page_action": {
    "browser_style": true,
    "default_icon": "icons/warning.svg",
    "default_title": "This page has been detected as phishing",
    "default_popup": "popups/trust_site.html"
  },
  "background": {
    "scripts": [
      "background.js",
      "punycode/punycode.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "certs.js"
      ]
    }
  ]
}