Examine source code of Safe Search Engine

{
  "manifest_version": 2,
  "name": "Safe Search Engine",
  "short_name": "Safe Search Engine",
  "description": "Safe Search Engine for kids, students and society. We show safe search results only",
  "version": "5.0",
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "author": "Safe Search Engine",
  "icons": {
    "16": "favicon-16x16.png",
    "48": "android-icon-48x48.png",
    "128": "apple-icon-120x120.png"
  },
  "browser_action": {
    "default_icon": "search-logo.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.safesearchengine.com/*"
      ],
      "js": [
        "background.js"
      ]
    }
  ],
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "web_accessible_resources": [
    "favicon-16x16.png",
    "android-icon-48x48.png",
    "apple-icon-120x120.png",
    "search-logo.png",
    "index.html",
    "background.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bb7ff8f6-3c3f-4928-a0af-c01bded0febb}"
    }
  }
}