Examine source code of CyberCheck360 Email Guard

{
  "manifest_version": 3,
  "name": "CyberCheck360 Email Guard",
  "short_name": "CyberCheck360 Email Guard",
  "version": "1.0.1",
  "description": "Every Gmail link, checked before you click. Preview any page safely. Open risky attachments in a sandbox. Built for non-techies.",
  "action": {
    "default_icon": {
      "16": "CC360-Email-Logo-16x16.png",
      "48": "CC360-Email-Logo-48x48.png",
      "128": "CC360-Email-Logo-128x128.png"
    }
  },
  "sidebar_action": {
    "default_panel": "popup.html",
    "open_at_install": false,
    "default_icon": {
      "16": "CC360-Email-Logo-16x16.png",
      "48": "CC360-Email-Logo-48x48.png",
      "128": "CC360-Email-Logo-128x128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "CC360-Email-Logo-16x16.png",
    "48": "CC360-Email-Logo-48x48.png",
    "128": "CC360-Email-Logo-128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "identity",
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "https://mail.google.com/*",
    "https://*.googleusercontent.com/*",
    "https://boldwinkie.cybercheck360.com/*",
    "https://email.cybercheck360.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "auth-required.html",
        "Cybercheck360_Logo_Email.webp",
        "logofav.webp",
        "Cybercheck360-Icon-Blue-48x48.png",
        "Cybercheck360_Logo_White.png",
        "Cybercheck360_Logo-04_Square_32.png",
        "Cybercheck360_Login_Background.svg",
        "CC360-Email-Logo-48x48.png"
      ],
      "matches": [
        "https://mail.google.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "gmail-email-guard@cybercheck360.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteContent",
          "websiteActivity"
        ]
      }
    }
  }
}