Examine source code of Real Estate Buddy

{
  "name": "Real Estate Buddy",
  "description": "Find your perfect home...faster!",
  "manifest_version": 2,
  "version": "1.3.9",
  "icons": {
    "16": "16x16.png",
    "48": "48x48.png",
    "128": "128x128.png"
  },
  "browser_action": {
    "default_icon": "16x16.png",
    "default_title": "Real Estate Buddy"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.realestate.com.au/*",
        "https://*.domain.com.au/*",
        "https://*.zillow.com/*",
        "https://*.trulia.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "menu.html",
    "16x16.png",
    "48x48.png"
  ],
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_security_policy": "default-src 'self'; img-src * 'self' data: https:; style-src 'self' 'unsafe-inline'; script-src  'self'; connect-src https://*.realestate.com.au/* https://*.domain.com.au/* https://*.zillow.com/* https://*.trulia.com/*"
}