Examine source code of SteamPork

{
  "manifest_version": 2,
  "name": "SteamPork",
  "version": "1.0.2",
  "description": "🐷 Protect your Steam account from phishing sites",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "79.0",
      "id": "inbox@makosn1k.me"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "SteamPork - Phishing Protection"
  },
  "permissions": [
    "storage",
    "webNavigation",
    "activeTab"
  ],
  "web_accessible_resources": [
    "styles/warning.css"
  ]
}