Examine source code of Core Protect

{
  "name": "Core Protect",
  "description": "Pre-screen Ethereum transactions to detect scams before they happen.",
  "icons": {
    "16": "icons/logo-filled-16.png",
    "32": "icons/logo-filled-32.png",
    "48": "icons/logo-filled-48.png",
    "96": "icons/logo-filled-96.png",
    "128": "icons/logo-filled-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_scripts/inject.js"
      ],
      "run_at": "document_start"
    }
  ],
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icons/logo-filled-16.png",
      "32": "icons/logo-filled-32.png",
      "48": "icons/logo-filled-48.png",
      "96": "icons/logo-filled-96.png",
      "128": "icons/logo-filled-128.png"
    },
    "default_title": "Core Protect",
    "default_popup": "popup/app.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "webRequest",
    "scripting",
    "tabs",
    "storage"
  ],
  "web_accessible_resources": [
    "content_scripts/*"
  ],
  "version": "2.3.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{05b9d1b8-68b8-4949-9982-bc56dd4133f5}"
    }
  }
}