Examine source code of ScamBrake - Scam Protection

{
  "manifest_version": 3,
  "name": "ScamBrake - Scam Protection",
  "version": "0.1.4",
  "id": "{fb81d653-af87-404d-b3e4-d9ecf8c77365}",
  "browser_specific_settings": {
    "gecko": {
      "id": "{fb81d653-af87-404d-b3e4-d9ecf8c77365}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "description": "Real-time protection from online scams. Warns you before you get tricked.",
  "homepage_url": "https://scambrake.com",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "https://mail.google.com/*",
    "https://outlook.live.com/*",
    "https://outlook.office.com/*",
    "https://outlook.office365.com/*",
    "https://mail.yahoo.com/*",
    "https://mail.aol.com/*",
    "https://mail.proton.me/*",
    "https://protonmail.com/*",
    "https://web.whatsapp.com/*",
    "https://www.messenger.com/*",
    "https://www.facebook.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*",
        "https://outlook.live.com/*",
        "https://outlook.office.com/*",
        "https://outlook.office365.com/*",
        "https://mail.yahoo.com/*",
        "https://mail.aol.com/*",
        "https://mail.proton.me/*",
        "https://protonmail.com/*",
        "https://web.whatsapp.com/*",
        "https://www.messenger.com/*",
        "https://www.facebook.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "warning-banner.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}